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-.\" Copyright (c) 1994
-.\" The Regents of the University of California. All rights reserved.
-.\" Copyright (c) 1994, 1995, 1996
-.\" Keith Bostic. All rights reserved.
-.\"
-.\" See the LICENSE file for redistribution information.
-.\"
-.\" @(#)vi.cmd.roff 8.49 (Berkeley) 8/17/96
-.\"
-.SH 1 "Vi Description"
-.pp
-.CO Vi
-takes up the entire screen to display the edited file,
-except for the bottom line of the screen.
-The bottom line of the screen is used to enter
-.CO ex
-commands, and for
-.CO vi
-error and informational messages.
-If no other information is being displayed,
-the default display can show the current cursor row and cursor column,
-an indication of whether the file has been modified,
-and the current mode of the editor.
-See the
-.OP ruler
-and
-.OP showmode
-options for more information.
-.pp
-Empty lines do not have any special representation on the screen,
-but lines on the screen that would logically come after the end of
-the file are displayed as a single tilde
-.PQ ~
-character.
-To differentiate between empty lines and lines consisting of only
-whitespace characters, use the
-.OP list
-option.
-Historically, implementations of
-.CO vi
-have also displayed some lines as single asterisk
-.PQ @
-characters.
-These were lines that were not correctly displayed, i.e. lines on the
-screen that did not correspond to lines in the file, or lines that did
-not fit on the current screen.
-.CO Nvi
-never displays lines in this fashion.
-.pp
-.CO Vi
-is a modeful editor, i.e. it has two modes,
-.QQ command
-mode and
-.QQ "text input"
-mode.
-When
-.CO vi
-first starts, it is in command mode.
-There are several commands that change
-.CO vi
-into text input mode.
-The
-.LI <escape>
-character is used to resolve the text input into the file,
-and exit back into command mode.
-In
-.CO vi
-command mode, the cursor is always positioned on the last column of
-characters which take up more than one column on the screen.
-In
-.CO vi
-text insert mode, the cursor is positioned on the first column of
-characters which take up more than one column on the screen.
-.pp
-When positioning the cursor to a new line and column,
-the type of movement is defined by the distance to the new cursor position.
-If the new position is close,
-the screen is scrolled to the new location.
-If the new position is far away,
-the screen is repainted so that the new position is on the screen.
-If the screen is scrolled,
-it is moved a minimal amount,
-and the cursor line will usually appear at the top or bottom of the screen.
-If the screen is repainted,
-the cursor line will appear in the center of the screen,
-unless the cursor is sufficiently close to the beginning or end of the file
-that this isn't possible.
-If the
-.OP leftright
-option is set, the screen may be scrolled or repainted in a horizontal
-direction as well as in a vertical one.
-.pp
-A major difference between the historical
-.CO vi
-presentation and
-.CO nvi
-is in the scrolling and screen oriented position commands,
-.CO <control-B> ,
-.CO <control-D> ,
-.CO <control-E> ,
-.CO <control-F> ,
-.CO <control-U> ,
-.CO <control-Y> ,
-.CO H ,
-.CO L
-and
-.CO M .
-In historical implementations of
-.CO vi ,
-these commands acted on physical (as opposed to logical, or screen)
-lines.
-For lines that were sufficiently long in relation to the size of the
-screen, this meant that single line scroll commands might repaint the
-entire screen, scrolling or screen positioning commands might not change
-the screen or move the cursor at all, and some lines simply could not
-be displayed, even though
-.CO vi
-would edit the file that contained them.
-In
-.CO nvi ,
-these commands act on logical, i.e. screen lines.
-You are unlikely to notice any difference unless you are editing files
-with lines significantly longer than a screen width.
-.pp
-.CO Vi
-keeps track of the currently
-.QQ "most attractive"
-cursor position.
-Each command description (for commands that alter the current cursor
-position),
-specifies if the cursor is set to a specific location in the line,
-or if it is moved to the
-.QQ "most attractive cursor position" .
-The latter means that the cursor is moved to the cursor position that
-is horizontally as close as possible to the current cursor position.
-If the current line is shorter than the cursor position
-.CO vi
-would select, the cursor is positioned on the last character in the line.
-(If the line is empty, the cursor is positioned on the first column
-of the line.)
-If a command moves the cursor to the most attractive position,
-it does not alter the current cursor position, and a subsequent
-movement will again attempt to move the cursor to that position.
-Therefore, although a movement to a line shorter than the currently
-most attractive position will cause the cursor to move to the end of
-that line, a subsequent movement to a longer line will cause the
-cursor to move back to the most attractive position.
-.pp
-In addition, the
-.CO $
-command makes the end of each line the most attractive cursor position
-rather than a specific column.
-.pp
-Each
-.CO vi
-command described below notes where the cursor ends up after it is
-executed.
-This position is described in terms of characters on the line, i.e.
-.QQ "the previous character" ,
-or,
-.QQ "the last character in the line" .
-This is to avoid needing to continually refer to on what part of the
-character the cursor rests.
-.pp
-The following words have special meaning for
-.CO vi
-commands.
-.KY "previous context"
-.IP "previous context"
-The position of the cursor before the command which caused the
-last absolute movement was executed.
-Each
-.CO vi
-command described in the next section that is considered an
-absolute movement is so noted.
-In addition, specifying
-.i any
-address to an
-.CO ex
-command is considered an absolute movement.
-.KY "motion"
-.IP "motion"
-A second
-.CO vi
-command can be used as an optional trailing argument to the
-.CO vi
-.CO \&< ,
-.CO \&> ,
-.CO \&! ,
-.CO \&c ,
-.CO \&d ,
-.CO \&y ,
-and (depending on the
-.OP tildeop
-option)
-.CO \&~
-commands.
-This command indicates the end of the region of text that's affected by
-the command.
-The motion command may be either the command character repeated (in
-which case it means the current line) or a cursor movement command.
-In the latter case, the region affected by the command is from the
-starting or stopping cursor position which comes first in the file,
-to immediately before the starting or stopping cursor position which
-comes later in the file.
-Commands that operate on lines instead of using beginning and ending
-cursor positions operate on all of the lines that are wholly or
-partially in the region.
-In addition, some other commands become line oriented depending on
-where in the text they are used.
-The command descriptions below note these special cases.
-.sp
-The following commands may all be used as motion components for
-.CO vi
-commands:
-.sp
-.ne 12v
-.ft C
-.TS
-r r r r.
-<control-A> <control-H> <control-J> <control-M>
-<control-N> <control-P> <space> $
-% '<character> ( )
-+ , - /
-0 ; ? B
-E F G H
-L M N T
-W [[ ]] ^
-\&_ `<character> b e
-f h j k
-l n t w
-{ | }
-.TE
-.ft R
-.sp
-The optional count prefix available for some of the
-.CO vi
-commands that take motion commands,
-or the count prefix available for the
-.CO vi
-commands that are used as motion components,
-may be included and is
-.i always
-considered part of the motion argument.
-For example, the commands
-.QT c2w
-and
-.QT 2cw
-are equivalent, and the region affected by the
-.CO c
-command is two words of text.
-In addition,
-if the optional count prefix is specified for both the
-.CO vi
-command and its motion component,
-the effect is multiplicative and is considered part of the motion argument.
-For example, the commands
-.QT 4cw
-and
-.QT 2c2w
-are equivalent, and the region affected by the
-.CO c
-command is four words of text.
-.KY "count"
-.IP "count"
-A positive number used as an optional argument to most commands,
-either to give a size or a position (for display or movement commands),
-or as a repeat count (for commands that modify text).
-The count argument is always optional and defaults to 1 unless otherwise
-noted in the command description.
-.sp
-When a
-.CO vi
-command synopsis shows both a
-.LI [buffer]
-and
-.LI [count] ,
-they may be presented in any order.
-.KY word
-.IP word
-Generally, in languages where it is applicable,
-.CO vi
-recognizes two kinds of words.
-First, a sequence of letters, digits and underscores,
-delimited at both ends by:
-characters other than letters, digits, or underscores,
-the beginning or end of a line, and the beginning or end of the file.
-Second, a sequence of characters other than letters, digits, underscores,
-or whitespace characters, delimited at both ends by: a letter, digit,
-underscore, or whitespace character,
-the beginning or end of a line, and the beginning or end of the file.
-For example, the characters
-.QT " !@#abc$%^ "
-contain three words:
-.QT "!@#" ,
-.QT "abc"
-and
-.QT "$%^" .
-.sp
-Groups of empty lines (or lines containing only whitespace characters)
-are treated as a single word.
-.KY "bigword"
-.IP "bigword"
-A set of non-whitespace characters preceded and followed by whitespace
-characters or the beginning or end of the file or line.
-For example, the characters
-.QT " !@#abc$%^ "
-contain one bigword:
-.QT "!@#abc$%^" .
-.sp
-Groups of empty lines (or lines containing only whitespace characters)
-are treated as a single bigword.
-.KY "paragraph"
-.IP "paragraph"
-An area of text that begins with either the beginning of a file,
-an empty line, or a section boundary, and continues until either
-an empty line, section boundary, or the end of the file.
-.sp
-Groups of empty lines (or lines containing only whitespace characters)
-are treated as a single paragraph.
-.sp
-Additional paragraph boundaries can be defined using the
-.OP paragraphs
-option.
-.KY "section"
-.IP "section"
-An area of text that starts with the beginning of the file or a line
-whose first character is an open brace
-.PQ {
-and continues until the next section or the end of the file.
-.sp
-Additional section boundaries can be defined using the
-.OP sections
-option.
-.KY "sentence"
-.IP "sentence"
-An area of text that begins with either the beginning of the file or the
-first nonblank character following the previous sentence, paragraph, or
-section boundary and continues until the end of the file or a period
-.PQ \&.
-exclamation point
-.PQ !
-or question mark
-.PQ ?
-character,
-followed by either an end-of-line or two whitespace characters.
-Any number of closing parentheses
-.PQ ) ,
-brackets
-.PQ ] ,
-double-quote
-.PQ """"
-or single quote
-.PQ '
-characters can appear between the period, exclamation point,
-or question mark and the whitespace characters or end-of-line.
-.sp
-Groups of empty lines (or lines containing only whitespace characters)
-are treated as a single sentence.
-.SH 1 "Vi Commands"
-.pp
-The following section describes the commands available in the command
-mode of the
-.CO vi
-editor.
-In each entry below, the tag line is a usage synopsis for the command
-character.
-In addition, the final line and column the cursor rests upon,
-and any options which affect the command are noted.
-.KY <control-A>
-.IP "[count] <control-A>"
-Search forward
-.LI count
-times for the current word.
-The current word begins at the first non-whitespace character on or
-after the current cursor position,
-and extends up to the next non-word character or the end of the line.
-The search is literal, i.e. no characters in the word have any special
-meaning in terms of Regular Expressions.
-It is an error if no matching pattern is found between the starting position
-and the end of the file.
-.sp
-The
-.CO <control-A>
-command is an absolute movement.
-The
-.CO <control-A>
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Set to the line where the word is found.
-.SP Column:
-Set to the first character of the word.
-.SP Options:
-Affected by the
-.OP ignorecase
-and
-.OP wrapscan
-options.
-.SE
-.KY <control-B>
-.IP "[count] <control-B>"
-Page backward
-.LI count
-screens.
-Two lines of overlap are maintained, if possible,
-by displaying the window starting at line
-.LI "(top_line - count * window_size) + 2" ,
-where
-.LI window_size
-is the value of the
-.OP window
-option.
-(In the case of split screens, this size is corrected to the
-current screen size.)
-It is an error if the movement is past the beginning of the file.
-.SS
-.SP Line:
-Set to the last line of text displayed on the screen.
-.SP Column:
-Set to the first nonblank character of the line.
-.SP Options:
-Affected by the
-.OP window
-option.
-.SE
-.KY <control-D>
-.IP "[count] <control-D>"
-Scroll forward
-.LI count
-lines.
-If
-.LI count
-is not specified, scroll forward the number of lines specified by the last
-.CO <control-D>
-or
-.CO <control-U>
-command.
-If this is the first
-.CO <control-D>
-or
-.CO <control-U>
-command,
-scroll forward half the number of lines in the screen.
-(In the case of split screens, the default scrolling distance is
-corrected to half the current screen size.)
-It is an error if the movement is past the end of the file.
-.SS
-.SP Line:
-Set to the current line plus the number of lines scrolled.
-.SP Column:
-Set to the first nonblank character of the line.
-.SP Options:
-None.
-.SE
-.KY <control-E>
-.IP "[count] <control-E>"
-Scroll forward
-.LI count
-lines, leaving the cursor on the current line and column, if possible.
-It is an error if the movement is past the end of the file.
-.SS
-.SP Line:
-Unchanged unless the current line scrolls off the screen,
-in which case it is set to the first line on the screen.
-.SP Column:
-Unchanged unless the current line scrolls off the screen,
-in which case it is set to the most attractive cursor position.
-.SP Options:
-None.
-.SE
-.KY <control-F>
-.IP "[count] <control-F>"
-Page forward
-.LI count
-screens.
-Two lines of overlap are maintained, if possible,
-by displaying the window starting at line
-.LI "top_line + count * window_size - 2" ,
-where
-.LI window_size
-is the value of the
-.OP window
-option.
-(In the case of split screens, this size is corrected to the
-current screen size.)
-It is an error if the movement is past the end of the file.
-.SS
-.SP Line:
-Set to the first line on the screen.
-.SP Column:
-Set to the first nonblank character of the current line.
-.SP Options:
-Affected by the
-.OP window
-option.
-.SE
-.KY <control-G>
-.IP "<control-G>"
-Display the file information.
-The information includes the current pathname, the current line,
-the number of total lines in the file, the current line as a percentage
-of the total lines in the file, if the file has been modified,
-was able to be locked, if the file's name has been changed,
-and if the edit session is read-only.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Unchanged.
-.SP Options:
-None.
-.SE
-.KY <control-H>
-.IP "[count] <control-H>"
-.Ip "[count] h"
-Move the cursor back
-.LI count
-characters in the current line.
-It is an error if the cursor is on the first character in the line.
-.sp
-The
-.CO <control-H>
-and
-.CO h
-commands may be used as the motion component of other
-.CO vi
-commands,
-in which case any text copied into a buffer is character oriented.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the
-.LI "current - count"
-character, or, the first character in the line if
-.LI count
-is greater than or equal to the number of characters in the line
-before the cursor.
-.SP Options:
-None.
-.SE
-.KY <control-J>
-.IP "[count] <control-J>"
-.KY <control-N>
-.Ip "[count] <control-N>"
-.KY j
-.Ip "[count] j"
-Move the cursor down
-.LI count
-lines without changing the current column.
-It is an error if the movement is past the end of the file.
-.sp
-The
-.CO <control-J> ,
-.CO <control-N>
-and
-.CO j
-commands may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-line oriented.
-.SS
-.SP Line:
-Set to the current line plus
-.LI count .
-.SP Column:
-The most attractive cursor position.
-.SP Options:
-None.
-.SE
-.KY <control-L>
-.IP "<control-L>"
-.KY <control-R>
-.Ip "<control-R>"
-Repaint the screen.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Unchanged.
-.SP Options:
-None.
-.SE
-.KY <control-M>
-.IP "[count] <control-M>"
-.KY +
-.Ip "[count] +"
-Move the cursor down
-.LI count
-lines to the first nonblank character of that line.
-It is an error if the movement is past the end of the file.
-.sp
-The
-.CO <control-M>
-and
-.CO +
-commands may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-line oriented.
-.SS
-.SP Line:
-Set to the current line plus
-.LI count .
-.SP Column:
-Set to the first nonblank character in the line.
-.SP Options:
-None.
-.SE
-.KY <control-P>
-.IP "[count] <control-P>"
-.KY k
-.Ip "[count] k"
-Move the cursor up
-.LI count
-lines, without changing the current column.
-It is an error if the movement is past the beginning of the file.
-.sp
-The
-.CO <control-P>
-and
-.CO k
-commands may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-line oriented.
-.SS
-.SP Line:
-Set to the current line minus
-.LI count .
-.SP Column:
-The most attractive cursor position.
-.SP Options:
-None.
-.SE
-.KY <control-T>
-.IP "<control-T>"
-Return to the most recent tag context.
-The
-.CO <control-T>
-command is an absolute movement.
-.SS
-.SP Line:
-Set to the context of the previous tag command.
-.SP Column:
-Set to the context of the previous tag command.
-.SP Options:
-None.
-.SE
-.KY <control-U>
-.IP "[count] <control-U>"
-Scroll backward
-.LI count
-lines.
-If
-.LI count
-is not specified, scroll backward the number of lines specified by the
-last
-.CO <control-D>
-or
-.CO <control-U>
-command.
-If this is the first
-.CO <control-D>
-or
-.CO <control-U>
-command,
-scroll backward half the number of lines in the screen.
-(In the case of split screens, the default scrolling distance is
-corrected to half the current screen size.)
-It is an error if the movement is past the beginning of the file.
-.SS
-.SP Line:
-Set to the current line minus the amount scrolled.
-.SP Column:
-Set to the first nonblank character in the line.
-.SP Options:
-None.
-.SE
-.KY <control-W>
-.IP "<control-W>"
-Switch to the next lower screen in the window, or, to the first
-screen if there are no lower screens in the window.
-.SS
-.SP Line:
-Set to the previous cursor position in the window.
-.SP Column:
-Set to the previous cursor position in the window.
-.SP Options:
-None.
-.SE
-.KY <control-Y>
-.IP "[count] <control-Y>"
-Scroll backward
-.LI count
-lines, leaving the current line and column as is, if possible.
-It is an error if the movement is past the beginning of the file.
-.SS
-.SP Line:
-Unchanged unless the current line scrolls off the screen,
-in which case it is set to the last line of text displayed
-on the screen.
-.SP Column:
-Unchanged unless the current line scrolls off the screen,
-in which case it is the most attractive cursor position.
-.SP Options:
-None.
-.SE
-.KY <control-Z>
-.IP "<control-Z>"
-Suspend the current editor session.
-If the file has been modified since it was last completely written,
-and the
-.OP autowrite
-option is set, the file is written before the editor session is
-suspended.
-If this write fails, the editor session is not suspended.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Unchanged.
-.SP Options:
-Affected by the
-.OP autowrite
-option.
-.SE
-.KY <escape>
-.IP "<escape>"
-Execute
-.CO ex
-commands or cancel partial commands.
-If an
-.CO ex
-command is being entered (e.g.
-.CO / ,
-.CO ? ,
-.CO :
-or
-.CO ! ),
-the command is executed.
-If a partial command has been entered, e.g.
-.QT "[0-9]*" ,
-or
-.QT "[0-9]*[!<>cdy]" ,
-the command is cancelled.
-Otherwise, it is an error.
-.SS
-.SP Line:
-When an
-.CO ex
-command is being executed, the current line is set as described for
-that command.
-Otherwise, unchanged.
-.SP Column:
-When an
-.CO ex
-command is being executed, the current column is set as described for
-that command.
-Otherwise, unchanged.
-.SP Options:
-None.
-.SE
-.KY <control-]>
-.IP "<control-]>"
-Push a tag reference onto the tag stack.
-The tags files (see the
-.OP tags
-option for more information) are searched for a tag matching the
-current word.
-The current word begins at the first non-whitespace character on or
-after the current cursor position,
-and extends up to the next non-word character or the end of the line.
-If a matching tag is found, the current file is discarded and the
-file containing the tag reference is edited.
-.sp
-If the current file has been modified since it was last completely
-written, the command will fail.
-The
-.CO <control-]>
-command is an absolute movement.
-.SS
-.SP Line:
-Set to the line containing the matching tag string.
-.SP Column:
-Set to the start of the matching tag string.
-.SP Options:
-Affected by the
-.OP tags
-and
-.OP taglength
-options.
-.SE
-.KY <control-^>
-.IP "<control-^>"
-Switch to the most recently edited file.
-.sp
-If the file has been modified since it was last completely written,
-and the
-.OP autowrite
-option is set, the file is written out.
-If this write fails, the command will fail.
-Otherwise, if the current file has been modified since it was last
-completely written, the command will fail.
-.SS
-.SP Line:
-Set to the line the cursor was on when the file was last edited.
-.SP Column:
-Set to the column the cursor was on when the file was last edited.
-.SP Options:
-Affected by the
-.OP autowrite
-option.
-.SE
-.KY <space>
-.IP "[count] <space>"
-.KY l
-.Ip "[count] l"
-Move the cursor forward
-.LI count
-characters without changing the current line.
-It is an error if the cursor is on the last character in the line.
-.sp
-The
-.CO <space>
-and
-.CO \&l
-commands may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-In addition, these commands may be used as the motion components
-of other commands when the cursor is on the last character in the
-line, without error.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the current character plus the next
-.LI count
-characters, or to the last character on the line if
-.LI count
-is greater than the number of characters in the line after the
-current character.
-.SP Options:
-None.
-.SE
-.KY !
-.IP "[count] ! motion shell-argument(s)<carriage-return>"
-Replace text with results from a shell command.
-Pass the lines specified by the
-.LI count
-and
-.LI motion
-arguments as standard input to the program named by the
-.OP shell
-option, and replace those lines with the output (both
-standard error and standard output) of that command.
-.sp
-After the motion is entered,
-.CO vi
-prompts for arguments to the shell command.
-.sp
-Within those arguments,
-.QT %
-and
-.QT #
-characters are expanded to the current and alternate pathnames,
-respectively.
-The
-.QT !
-character is expanded with the command text of the previous
-.CO !
-or
-.CO :!
-commands.
-(Therefore, the command
-.CO !<motion>!
-repeats the previous
-.CO !
-command.)
-The special meanings of
-.QT % ,
-.QT #
-and
-.QT !
-can be overridden by escaping them with a backslash.
-If no
-.CO !
-or
-.CO :!
-command has yet been executed,
-it is an error to use an unescaped
-.QT !
-character as a shell argument.
-The
-.CO !
-command does
-.i not
-do shell expansion on the strings provided as arguments.
-If any of the above expansions change the arguments the user entered,
-the command is redisplayed at the bottom of the screen.
-.sp
-.CO Vi
-then executes the program named by the
-.OP shell
-option, with a
-.b \-c
-flag followed by the arguments (which are bundled into a single argument).
-.sp
-The
-.CO !
-command is permitted in an empty file.
-.sp
-If the file has been modified since it was last completely written,
-the
-.CO !
-command will warn you.
-.SS
-.SP Line:
-The first line of the replaced text.
-.SP Column:
-The first column of the replaced text.
-.SP Options:
-Affected by the
-.OP shell
-option.
-.SE
-.KY #
-.IP "[count] # #|+|-"
-Increment or decrement the number referenced by the cursor.
-If the trailing character is a
-.LI \&+
-or
-.LI \&# ,
-the number is incremented by
-.LI count .
-If the trailing character is a
-.LI \&- ,
-the number is decremented by
-.LI count .
-.sp
-A leading
-.QT \&0X
-or
-.QT \&0x
-causes the number to be interpreted as a hexadecimal number.
-Otherwise, a leading
-.QT \&0
-causes the number to be interpreted as an octal number, unless a non-octal
-digit is found as part of the number.
-Otherwise, the number is interpreted as a decimal number, and may
-have a leading
-.LI \&+
-or
-.LI \&-
-sign.
-The current number begins at the first non-blank character at or after
-the current cursor position, and extends up to the end of the line or
-the first character that isn't a possible character for the numeric type.
-The format of the number (e.g. leading 0's, signs) is retained unless
-the new value cannot be represented in the previous format.
-.sp
-Octal and hexadecimal numbers, and the result of the operation, must fit
-into an
-.QT "unsigned long" .
-Similarly, decimal numbers and their result must fit into a
-.QT "signed long" .
-It is an error to use this command when the cursor is not positioned at
-a number.
-.sp
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the first character in the cursor number.
-.SP Options:
-None.
-.SE
-.KY $
-.IP "[count] $"
-Move the cursor to the end of a line.
-If
-.LI count
-is specified, the cursor moves down
-.LI "count - 1"
-lines.
-.sp
-It is not an error to use the
-.CO $
-command when the cursor is on the last character in the line or
-when the line is empty.
-.sp
-The
-.CO $
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented, unless the cursor is at, or before the first
-nonblank character in the line, in which case it is line oriented.
-It is not an error to use the
-.CO $
-command as a motion component when the cursor is on the last character
-in the line, although it is an error when the line is empty.
-.SS
-.SP Line:
-Set to the current line plus
-.LI count
-minus 1.
-.SP Column:
-Set to the last character in the line.
-.SP Options:
-None.
-.SE
-.KY %
-.IP %
-Move to the matching character.
-The cursor moves to the parenthesis or curly brace which
-.i matches
-the parenthesis or curly brace found at the current cursor position
-or which is the closest one to the right of the cursor on the line.
-It is an error to execute the
-.CO %
-command on a line without a parenthesis or curly brace.
-Historically, any
-.LI count
-specified to the
-.CO %
-command was ignored.
-.sp
-The
-.CO %
-command is an absolute movement.
-The
-.CO %
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented, unless the starting point of the region is at
-or before the first nonblank character on its line, and the ending
-point is at or after the last nonblank character on its line, in
-which case it is line oriented.
-.SS
-.SP Line:
-Set to the line containing the matching character.
-.SP Column:
-Set to the matching character.
-.SP Options:
-None.
-.SE
-.KY &
-.IP "&"
-Repeat the previous substitution command on the current line.
-.sp
-Historically, any
-.LI count
-specified to the
-.CO &
-command was ignored.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Unchanged if the cursor was on the last character in the line,
-otherwise, set to the first nonblank character in the line.
-.SP Options:
-Affected by the
-.OP edcompatible ,
-.OP extended ,
-.OP ignorecase
-and
-.OP magic
-options.
-.SE
-.KY SQUOTE<character>
-.IP \'<character>
-.KY `<character>
-.Ip `<character>
-Return to a context marked by the character
-.LI <character> .
-If
-.LI <character>
-is the
-.QT '
-or
-.QT `
-character, return to the previous context.
-If
-.LI <character>
-is any other character,
-return to the context marked by that character (see the
-.CO m
-command for more information).
-If the command is the
-.CO \'
-command, only the line value is restored,
-and the cursor is placed on the first nonblank character of that line.
-If the command is the
-.CO `
-command, both the line and column values are restored.
-.sp
-It is an error if the context no longer exists because of
-line deletion.
-(Contexts follow lines that are moved, or which are deleted
-and then restored.)
-.sp
-The
-.CO \'
-and
-.CO `
-commands are both absolute movements.
-They may be used as a motion component for other
-.CO vi
-commands.
-For the
-.CO \'
-command, any text copied into a buffer is line oriented.
-For the
-.CO `
-command,
-any text copied into a buffer is character oriented,
-unless it both starts and stops at the first character in the line,
-in which case it is line oriented.
-In addition, when using the
-.CO `
-command as a motion component,
-commands which move backward and started at the first character in the line,
-or move forward and ended at the first character in the line,
-are corrected to the last character of the line preceding the starting and
-ending lines, respectively.
-.SS
-.SP Line:
-Set to the line from the context.
-.SP Column:
-Set to the first nonblank character in the line, for the
-.CO \'
-command, and set to the context's column for the
-.CO `
-command.
-.SP Options:
-None.
-.SE
-.KY (
-.IP "[count] ("
-Back up
-.LI count
-sentences.
-.sp
-The
-.CO (
-command is an absolute movement.
-The
-.CO (
-command may be used as the motion component of other
-.CO vi
-commands,
-in which case any text copied into a buffer is character oriented,
-unless the starting and stopping points of the region are the first
-character in the line,
-in which case it is line oriented.
-If it is line oriented,
-the starting point of the region is adjusted to be the end of the line
-immediately before the starting cursor position.
-.SS
-.SP Line:
-Set to the line containing the beginning of the sentence.
-.SP Column:
-Set to the first nonblank character of the sentence.
-.SP Options:
-Affected by the
-.OP lisp
-option.
-.SE
-.KY )
-.IP "[count] )"
-Move forward
-.LI count
-sentences.
-.sp
-The
-.CO )
-command is an absolute movement.
-The
-.CO )
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented, unless the starting point of the region is the
-first character in the line, in which case it is line oriented.
-In the latter case, if the stopping point of the region is also
-the first character in the line, it is adjusted to be the end of the
-line immediately before it.
-.SS
-.SP Line:
-Set to the line containing the beginning of the sentence.
-.SP Column:
-Set to the first nonblank character of the sentence.
-.SP Options:
-Affected by the
-.OP lisp
-option.
-.SE
-.KY ,
-.IP "[count] ,"
-Reverse find character
-.LI count
-times.
-Reverse the last
-.CO F ,
-.CO f ,
-.CO T
-or
-.CO t
-command, searching the other way in the line,
-.LI count
-times.
-It is an error if a
-.CO F ,
-.CO f ,
-.CO T
-or
-.CO t
-command has not been performed yet.
-.sp
-The
-.CO ,
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the searched-for character for the
-.CO F
-and
-.CO f
-commands,
-before the character for the
-.CO t
-command
-and after the character for the
-.CO T
-command.
-.SP Options:
-None.
-.SE
-.KY MINUSSIGN
-.IP "[count] \-"
-Move to the first nonblank of the previous line,
-.LI count
-times.
-.sp
-It is an error if the movement is past the beginning of the file.
-.sp
-The
-.CO -
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-line oriented.
-.SS
-.SP Line:
-Set to the current line minus
-.LI count .
-.SP Column:
-Set to the first nonblank character in the line.
-.SP Options:
-None.
-.SE
-.KY \&.
-.IP "[count] \&."
-Repeat the last
-.CO vi
-command that modified text.
-The repeated command may be a command and motion component combination.
-If
-.LI count
-is specified, it replaces
-.i both
-the count specified for the repeated command, and, if applicable, for
-the repeated motion component.
-If
-.LI count
-is not specified, the counts originally specified to the command being
-repeated are used again.
-.sp
-As a special case, if the
-.CO \.
-command is executed immediately after the
-.CO u
-command, the change log is rolled forward or backward, depending on
-the action of the
-.CO u
-command.
-.SS
-.SP Line:
-Set as described for the repeated command.
-.SP Column:
-Set as described for the repeated command.
-.SP Options:
-None.
-.SE
-.KY /RE/
-.IP "/RE<carriage-return>"
-.Ip "/RE/ [offset]<carriage-return>"
-.KY ?RE?
-.Ip "?RE<carriage-return>"
-.Ip "?RE? [offset]<carriage-return>"
-.KY N
-.Ip "N"
-.KY n
-.Ip "n"
-Search forward or backward for a regular expression.
-The commands beginning with a slash
-.PQ /
-character are forward searches, the commands beginning with a
-question mark
-.PQ ?
-are backward searches.
-.CO Vi
-prompts with the leading character on the last line of the screen
-for a string.
-It then searches forward or backward in the file for the next
-occurrence of the string, which is interpreted as a Basic Regular
-Expression.
-.sp
-The
-.CO /
-and
-.CO ?
-commands are absolute movements.
-They may be used as the motion components of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented, unless the search started and ended on
-the first column of a line, in which case it is line oriented.
-In addition, forward searches ending at the first character of a line,
-and backward searches beginning at the first character in the line,
-are corrected to begin or end at the last character of the previous line.
-(Note, forward and backward searches can occur for both
-.CO /
-and
-.CO ?
-commands, if the
-.OP wrapscan
-option is set.)
-.sp
-If an offset from the matched line is specified (i.e. a trailing
-.QT /
-or
-.QT ?
-character is followed by a signed offset), the buffer will always
-be line oriented (e.g.
-.QT /string/+0
-will always guarantee a line orientation).
-.sp
-The
-.CO N
-command repeats the previous search, but in the reverse direction.
-The
-.CO n
-command repeats the previous search.
-If either the
-.CO N
-or
-.CO n
-commands are used as motion components for the
-.CO !
-command, you will not be prompted for the text of the bang command,
-instead the previous bang command will be executed.
-.sp
-Missing RE's (e.g.
-.QT //<carriage-return> ,
-.QT /<carriage-return> ,
-.QT ??<carriage-return> ,
-or
-.QT ?<carriage-return>
-search for the last search RE, in the indicated direction.
-.sp
-Searches may be interrupted using the
-.LI <interrupt>
-character.
-.sp
-Multiple search patterns may be grouped together by delimiting
-them with semicolons and zero or more whitespace characters, e.g.
-.LI "/foo/ ; ?bar?"
-searches forward for
-.LI foo
-and then, from that location, backwards for
-.LI bar .
-When search patterns are grouped together in this manner,
-the search patterns are evaluated left to right with the
-final cursor position determined by the last search pattern.
-.sp
-It is also permissible to append a
-.CO z
-command to the search strings, e.g.
-.LI "/foo/ z."
-searches forward for the next occurrence of
-.LI foo ,
-and then positions that line in the middle of screen.
-.SS
-.SP Line:
-Set to the line in which the match occurred.
-.SP Column:
-Set to the first character of the matched string.
-.SP Options:
-Affected by the
-.OP edcompatible ,
-.OP extended ,
-.OP ignorecase ,
-.OP magic ,
-and
-.OP wrapscan
-options.
-.SE
-.KY 0
-.IP "0"
-Move to the first character in the current line.
-It is not an error to use the
-.CO 0
-command when the cursor is on the first character in the line,
-.sp
-The
-.CO 0
-command may be used as the motion component of other
-.CO vi
-commands,
-in which case it is an error if the cursor is on the first character
-in the line,
-and any text copied into a buffer is character oriented.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the first character in the line.
-.SP Options:
-None.
-.SE
-.KY :
-.IP ":"
-Execute an
-.CO ex
-command.
-.CO Vi
-prompts for an
-.CO ex
-command on the last line of the screen, using a colon
-.PQ :
-character.
-The command is terminated by a
-.LI <carriage-return> ,
-.LI <newline>
-or
-.LI <escape>
-character; all of these characters may be escaped by using a
-.LI "<literal-next>"
-character.
-The command is then executed.
-.sp
-If the
-.CO ex
-command writes to the screen,
-.CO vi
-will prompt the user for a
-.LI <carriage-return>
-before continuing
-when the
-.CO ex
-command finishes.
-Large amounts of output from the
-.CO ex
-command will be paged for the user, and the user prompted for a
-.LI <carriage-return>
-or
-.LI <space>
-key to continue.
-In some cases, a quit (normally a
-.QQ q
-character) or
-.LI <interrupt>
-may be entered to interrupt the
-.CO ex
-command.
-.sp
-When the
-.CO ex
-command finishes, and the user is prompted to resume visual mode,
-it is also possible to enter another
-.QT :
-character followed by another
-.CO ex
-command.
-.SS
-.SP Line:
-The current line is set as described for the
-.CO ex
-command.
-.SP Column:
-The current column is set as described for the
-.CO ex
-command.
-.SP Options:
-Affected as described for the
-.CO ex
-command.
-.SE
-.KY ;
-.IP "[count] ;"
-Repeat the last character find
-.LI count
-times.
-The last character find is one of the
-.CO F ,
-.CO f ,
-.CO T
-or
-.CO t
-commands.
-It is an error if a
-.CO F ,
-.CO f ,
-.CO T
-or
-.CO t
-command has not been performed yet.
-.sp
-The
-.CO ;
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the searched-for character for the
-.CO F
-and
-.CO f
-commands,
-before the character for the
-.CO t
-command
-and after the character for the
-.CO T
-command.
-.SP Options:
-None.
-.SE
-.KY <
-.IP "[count] < motion"
-.KY >
-.Ip "[count] > motion"
-Shift lines left or right.
-Shift the number of lines in the region specified by the
-.LI count
-and
-.LI motion
-left (for the
-.CO <
-command) or right (for the
-.CO >
-command) by the number of columns specified by the
-.OP shiftwidth
-option.
-Only whitespace characters are deleted when shifting left.
-Once the first character in the line no longer contains a whitespace
-character, the command will succeed,
-but the line will not be modified.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the first nonblank character in the line.
-.SP Options:
-Affected by the
-.OP shiftwidth
-option.
-.SE
-.KY @
-.IP "@ buffer"
-Execute a named buffer.
-Execute the named buffer as
-.CO vi
-commands.
-The buffer may include
-.CO ex
-commands, too, but they must be expressed as a
-.CO :
-command.
-If the buffer is line oriented,
-.LI <newline>
-characters are logically appended to each line of the buffer.
-If the buffer is character oriented,
-.LI <newline>
-characters are logically appended to all but the last line in the buffer.
-.sp
-If the buffer name is
-.QT @ ,
-or
-.QT * ,
-then the last buffer executed shall be used.
-It is an error to specify
-.QT @@
-or
-.QT @*
-if there were no previous buffer executions.
-The text of a buffer may contain a
-.CO @
-command,
-and it is possible to create infinite loops in this manner.
-(The
-.LI <interrupt>
-character may be used to interrupt the loop.)
-.SS
-.SP Line:
-The current line is set as described for the command(s).
-.SP Column:
-The current column is set as described for the command(s).
-.SP Options:
-None.
-.SE
-.KY A
-.IP "[count] A"
-Enter input mode, appending the text after the end of the line.
-If
-.LI count
-is specified, the text is repeatedly input
-.LI "count - 1"
-more times after input mode is exited.
-.SS
-.SP Line:
-Set to the last line upon which characters were entered.
-.SP Column:
-Set to the last character entered.
-.SP Options:
-Affected by the
-.OP altwerase ,
-.OP autoindent ,
-.OP beautify ,
-.OP showmatch ,
-.OP ttywerase
-and
-.OP wrapmargin
-options.
-.SE
-.KY B
-.IP "[count] B"
-Move backward
-.LI count
-bigwords.
-Move the cursor backward to the beginning of a bigword by repeating the
-following algorithm: if the current position is at the beginning of a
-bigword or the character at the current position cannot be part of a bigword,
-move to the first character of the preceding bigword.
-Otherwise, move to the first character of the bigword at the current position.
-If no preceding bigword exists on the current line, move to the first
-character of the last bigword on the first preceding line that contains a
-bigword.
-.sp
-The
-.CO B
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Set to the line containing the word selected.
-.SP Column:
-Set to the first character of the word selected.
-.SP Options:
-None.
-.SE
-.KY C
-.IP "[buffer] [count] C"
-Change text from the current position to the end-of-line.
-If
-.LI count
-is specified, the input text replaces from the current position to
-the end-of-line, plus
-.LI "count - 1"
-subsequent lines.
-.SS
-.SP Line:
-Set to the last line upon which characters were entered.
-.SP Column:
-Set to the last character entered.
-.SP Options:
-Affected by the
-.OP altwerase ,
-.OP autoindent ,
-.OP beautify ,
-.OP showmatch ,
-.OP ttywerase
-and
-.OP wrapmargin
-options.
-.SE
-.KY D
-.IP "[buffer] D"
-Delete text from the current position to the end-of-line.
-.sp
-It is not an error to execute the
-.CO D
-command on an empty line.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the character before the current character, or, column 1 if
-the cursor was on column 1.
-.SP Options:
-None.
-.SE
-.KY E
-.IP "[count] E"
-Move forward
-.LI count
-end-of-bigwords.
-Move the cursor forward to the end of a bigword by repeating the
-following algorithm: if the current position is the end of a
-bigword or the character at that position cannot be part of a bigword,
-move to the last character of the following bigword.
-Otherwise, move to the last character of the bigword at the current
-position.
-If no succeeding bigword exists on the current line,
-move to the last character of the first bigword on the next following
-line that contains a bigword.
-.sp
-The
-.CO E
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Set to the line containing the word selected.
-.SP Column:
-Set to the last character of the word selected.
-.SP Options:
-None.
-.SE
-.KY F
-.IP "[count] F <character>"
-Search
-.LI count
-times backward through the current line for
-.LI <character> .
-.sp
-The
-.CO F
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the searched-for character.
-.SP Options:
-None.
-.SE
-.KY G
-.IP "[count] G"
-Move to line
-.LI count ,
-or the last line of the file if
-.LI count
-not specified.
-.sp
-The
-.CO G
-command is an absolute movement.
-The
-.CO \&G
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-line oriented.
-.SS
-.SP Line:
-Set to
-.LI count ,
-if specified, otherwise, the last line.
-.SP Column:
-Set to the first nonblank character in the line.
-.SP Options:
-None.
-.SE
-.KY H
-.IP "[count] H"
-Move to the screen line
-.LI "count - 1"
-lines below the top of the screen.
-.sp
-The
-.CO H
-command is an absolute movement.
-The
-.CO H
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-line oriented.
-.SS
-.SP Line:
-Set to the line
-.LI "count - 1"
-lines below the top of the screen.
-.SP Column:
-Set to the first nonblank character of the
-.i screen
-line.
-.SP Options:
-None.
-.SE
-.KY I
-.IP "[count] I"
-Enter input mode, inserting the text at the beginning of the line.
-If
-.LI count
-is specified, the text input is repeatedly input
-.LI "count - 1"
-more times.
-.SS
-.SP Line:
-Set to the last line upon which characters were entered.
-.SP Column:
-Set to the last character entered.
-.SP Options:
-None.
-.SE
-.KY J
-.IP "[count] J"
-Join lines.
-If
-.LI count
-is specified,
-.LI count
-lines are joined; a minimum of two lines are always joined,
-regardless of the value of
-.LI count .
-.sp
-If the current line ends with a whitespace character, all whitespace
-is stripped from the next line.
-Otherwise, if the next line starts with a open parenthesis
-.PQ (
-do nothing.
-Otherwise, if the current line ends with a question mark
-.PQ ? ,
-period
-.PQ \&.
-or exclamation point
-.PQ ! ,
-insert two spaces.
-Otherwise, insert a single space.
-.sp
-It is not an error to join lines past the end of the file,
-i.e. lines that do not exist.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the character after the last character of the next-to-last
-joined line.
-.SP Options:
-None.
-.SE
-.KY L
-.IP "[count] L"
-Move to the screen line
-.LI "count - 1"
-lines above the bottom of the screen.
-.sp
-The
-.CO L
-command is an absolute movement.
-The
-.CO L
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-line oriented.
-.SS
-.SP Line:
-Set to the line
-.LI "count - 1"
-lines above the bottom of the screen.
-.SP Column:
-Set to the first nonblank character of the
-.i screen
-line.
-.SP Options:
-None.
-.SE
-.KY M
-.IP " M"
-Move to the screen line in the middle of the screen.
-.sp
-The
-.CO M
-command is an absolute movement.
-The
-.CO M
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-line oriented.
-.sp
-Historically, any
-.LI count
-specified to the
-.CO M
-command was ignored.
-.SS
-.SP Line:
-Set to the line in the middle of the screen.
-.SP Column:
-Set to the first nonblank character of the
-.i screen
-line.
-.SP Options:
-None.
-.SE
-.KY O
-.IP "[count] O"
-Enter input mode, appending text in a new line above the current line.
-If
-.LI count
-is specified, the text input is repeatedly input
-.LI "count - 1"
-more times.
-.sp
-Historically, any
-.LI count
-specified to the
-.CO O
-command was ignored.
-.SS
-.SP Line:
-Set to the last line upon which characters were entered.
-.SP Column:
-Set to the last character entered.
-.SP Options:
-Affected by the
-.OP altwerase ,
-.OP autoindent ,
-.OP beautify ,
-.OP showmatch ,
-.OP ttywerase
-and
-.OP wrapmargin
-options.
-.SE
-.KY P
-.IP "[buffer] P"
-Insert text from a buffer.
-Text from the buffer (the unnamed buffer by default) is inserted
-before the current column or, if the buffer is line oriented,
-before the current line.
-.SS
-.SP Line:
-Set to the lowest numbered line insert,
-if the buffer is line oriented, otherwise unchanged.
-.SP Column:
-Set to the first nonblank character of the appended text,
-if the buffer is line oriented, otherwise, the last character
-of the appended text.
-.SP Options:
-None.
-.SE
-.KY Q
-.IP "Q"
-Exit
-.CO vi
-(or visual) mode and switch to
-.CO ex
-mode.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-No longer relevant.
-.SP Options:
-None.
-.SE
-.KY R
-.IP "[count] R"
-Enter input mode, replacing the characters in the current line.
-If
-.LI count
-is specified, the text input is repeatedly input
-.LI "count - 1"
-more times.
-.sp
-If the end of the current line is reached, no more characters are
-replaced and any further characters input are appended to the line.
-.SS
-.SP Line:
-Set to the last line upon which characters were entered.
-.SP Column:
-Set to the last character entered.
-.SP Options:
-Affected by the
-.OP altwerase ,
-.OP autoindent ,
-.OP beautify ,
-.OP showmatch ,
-.OP ttywerase
-and
-.OP wrapmargin
-options.
-.SE
-.KY S
-.IP "[buffer] [count] S"
-Substitute
-.LI count
-lines.
-.SS
-.SP Line:
-Set to the last line upon which characters were entered.
-.SP Column:
-Set to the last character entered.
-.SP Options:
-Affected by the
-.OP altwerase ,
-.OP autoindent ,
-.OP beautify ,
-.OP showmatch ,
-.OP ttywerase
-and
-.OP wrapmargin
-options.
-.SE
-.KY T
-.IP "[count] T <character>"
-Search backward,
-.LI count
-times,
-through the current line for the character
-.i after
-the specified
-.LI <character> .
-.sp
-The
-.CO T
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the character
-.i after
-the searched-for character.
-.SP Options:
-None.
-.SE
-.KY U
-.IP "U"
-Restore the current line to its state before the cursor last
-moved to it.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-The first character in the line.
-.SP Options:
-None.
-.SE
-.KY W
-.IP "[count] W"
-Move forward
-.LI count
-bigwords.
-Move the cursor forward to the beginning of a bigword by repeating the
-following algorithm: if the current position is within a bigword or the
-character at that position cannot be part of a bigword, move to the first
-character of the next bigword.
-If no subsequent bigword exists on the current line,
-move to the first character of the first bigword on the first following
-line that contains a bigword.
-.sp
-The
-.CO W
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-The line containing the word selected.
-.SP Column:
-The first character of the word selected.
-.SP Options:
-None.
-.SE
-.KY X
-.IP "[buffer] [count] X"
-Delete
-.LI count
-characters before the cursor.
-If the number of characters to be deleted is greater than or equal to
-the number of characters to the beginning of the line, all of the
-characters before the current cursor position, to the beginning of the
-line, are deleted.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the current character minus
-.LI count ,
-or the first character if count is greater than the number of
-characters in the line before the cursor.
-.SP Options:
-None.
-.SE
-.KY Y
-.IP "[buffer] [count] Y"
-Copy (or
-.QQ yank )
-.LI count
-lines into the specified buffer.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Unchanged.
-.SP Options:
-None.
-.SE
-.KY ZZ
-.IP "ZZ"
-Write the file and exit
-.CO vi .
-The file is only written if it has been modified since the last
-complete write of the file to any file.
-.sp
-The
-.CO ZZ
-command will exit the editor after writing the file,
-if there are no further files to edit.
-Entering two
-.QQ quit
-commands (i.e.
-.CO wq ,
-.CO quit ,
-.CO xit
-or
-.CO ZZ )
-in a row will override this check and the editor will exit,
-ignoring any files that have not yet been edited.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Unchanged.
-.SP Options:
-None.
-.SE
-.KY [[
-.IP "[count] [["
-Back up
-.LI count
-section boundaries.
-.sp
-The
-.CO [[
-command is an absolute movement.
-The
-.CO [[
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented, unless the starting position is column 0,
-in which case it is line oriented.
-.sp
-It is an error if the movement is past the beginning of the file.
-.SS
-.SP Line:
-Set to the previous line that is
-.LI count
-section boundaries back,
-or the first line of the file if no more section boundaries exist
-preceding the current line.
-.SP Column:
-Set to the first nonblank character in the line.
-.SP Options:
-Affected by the
-.OP sections
-option.
-.SE
-.KY ]]
-.IP "[count] ]]"
-Move forward
-.LI count
-section boundaries.
-.sp
-The
-.CO ]]
-command is an absolute movement.
-The
-.CO ]]
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented, unless the starting position is column 0,
-in which case it is line oriented.
-.sp
-It is an error if the movement is past the end of the file.
-.SS
-.SP Line:
-Set to the line that is
-.LI count
-section boundaries forward,
-or to the last line of the file if no more section
-boundaries exist following the current line.
-.SP Column:
-Set to the first nonblank character in the line.
-.SP Options:
-Affected by the
-.OP sections
-option.
-.SE
-.KY ^
-.IP "\&^"
-Move to first nonblank character on the current line.
-.sp
-The
-.CO ^
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the first nonblank character of the current line.
-.SP Options:
-None.
-.SE
-.KY _
-.IP "[count] _"
-Move down
-.LI "count - 1"
-lines, to the first nonblank character.
-The
-.CO _
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-line oriented.
-.sp
-It is not an error to execute the
-.CO _
-command when the cursor is on the first character in the line.
-.SS
-.SP Line:
-The current line plus
-.LI "count - 1" .
-.SP Column:
-The first nonblank character in the line.
-.SP Options:
-None.
-.SE
-.KY a
-.IP "[count] a"
-Enter input mode, appending the text after the cursor.
-If
-.LI count
-is specified, the text input is repeatedly input
-.LI "count - 1"
-more times.
-.SS
-.SP Line:
-Set to the last line upon which characters were entered.
-.SP Column:
-Set to the last character entered.
-.SP Options:
-Affected by the
-.OP altwerase ,
-.OP autoindent ,
-.OP beautify ,
-.OP showmatch ,
-.OP ttywerase
-and
-.OP wrapmargin
-options.
-.SE
-.KY b
-.IP "[count] b"
-Move backward
-.LI count
-words.
-Move the cursor backward to the beginning of a word by repeating the
-following algorithm: if the current position is at the beginning of a word,
-move to the first character of the preceding word.
-Otherwise, the current position moves to the first character of the word
-at the current position.
-If no preceding word exists on the current line, move to the first
-character of the last word on the first preceding line that contains
-a word.
-.sp
-The
-.CO b
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Set to the line containing the word selected.
-.SP Column:
-Set to the first character of the word selected.
-.SP Options:
-None.
-.SE
-.KY c
-.IP "[buffer] [count] c motion"
-Change the region of text specified by the
-.LI count
-and
-.LI motion .
-If only part of a single line is affected, then the last character
-being changed is marked with a
-.QT $ .
-Otherwise, the region of text is deleted, and input mode is entered.
-.SS
-.SP Line:
-Set to the last line upon which characters were entered.
-.SP Column:
-Set to the last character entered.
-.SP Options:
-Affected by the
-.OP altwerase ,
-.OP autoindent ,
-.OP beautify ,
-.OP showmatch ,
-.OP ttywerase
-and
-.OP wrapmargin
-options.
-.SE
-.KY d
-.IP "[buffer] [count] d motion"
-Delete the region of text specified by the
-.LI count
-and
-.LI motion .
-.SS
-.SP Line:
-Set to the line where the region starts.
-.SP Column:
-Set to the first character in the line after the last character in the
-region.
-If no such character exists, set to the last character before the region.
-.SP Options:
-None.
-.SE
-.KY e
-.IP "[count] e"
-Move forward
-.LI count
-end-of-words.
-Move the cursor forward to the end of a word by repeating the following
-algorithm: if the current position is the end of a word,
-move to the last character of the following word.
-Otherwise, move to the last character of the word at the current position.
-If no succeeding word exists on the current line, move to the last character
-of the first word on the next following line that contains a word.
-.sp
-The
-.CO e
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Set to the line containing the word selected.
-.SP Column:
-Set to the last character of the word selected.
-.SP Options:
-None.
-.SE
-.KY f
-.IP "[count] f <character>"
-Search forward,
-.LI count
-times, through the rest of the current line for
-.LI <character> .
-.sp
-The
-.CO f
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the searched-for character.
-.SP Options:
-None.
-.SE
-.KY i
-.IP "[count] i"
-Enter input mode, inserting the text before the cursor.
-If
-.LI count
-is specified, the text input is repeatedly input
-.LI "count - 1"
-more times.
-.SS
-.SP Line:
-Set to the last line upon which characters were entered.
-.SP Column:
-Set to the last character entered.
-.SP Options:
-Affected by the
-.OP altwerase ,
-.OP autoindent ,
-.OP beautify ,
-.OP showmatch ,
-.OP ttywerase
-and
-.OP wrapmargin
-options.
-.SE
-.KY m
-.IP "m <character>"
-Save the current context (line and column) as
-.LI <character> .
-The exact position is referred to by
-.QT `<character> .
-The line is referred to by
-.QT '<character> .
-.sp
-Historically,
-.LI <character>
-was restricted to lower-case letters.
-.CO Nvi
-permits the use of any character.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Unchanged.
-.SP Options:
-None.
-.SE
-.KY o
-.IP "[count] o"
-Enter input mode, appending text in a new line under the current line.
-If
-.LI count
-is specified, the text input is repeatedly input
-.LI "count - 1"
-more times.
-.sp
-Historically, any
-.LI count
-specified to the
-.CO o
-command was ignored.
-.SS
-.SP Line:
-Set to the last line upon which characters were entered.
-.SP Column:
-Set to the last character entered.
-.SP Options:
-Affected by the
-.OP altwerase ,
-.OP autoindent ,
-.OP beautify ,
-.OP showmatch ,
-.OP ttywerase
-and
-.OP wrapmargin
-options.
-.SE
-.KY p
-.IP "[buffer] p"
-Append text from a buffer.
-Text from the buffer (the unnamed buffer by default) is appended
-after the current column or, if the buffer is line oriented,
-after the current line.
-.SS
-.SP Line:
-Set to the first line appended, if the buffer is line oriented,
-otherwise unchanged.
-.SP Column:
-Set to the first nonblank character of the appended text if the buffer
-is line oriented, otherwise, the last character of the appended text.
-.SP Options:
-None.
-.SE
-.KY r
-.IP "[count] r <character>"
-Replace characters.
-The next
-.LI count
-characters in the line are replaced with
-.LI <character> .
-Replacing characters with
-.LI <newline>
-characters results in creating new, empty lines into the file.
-.sp
-If
-.LI <character>
-is
-.LI <escape> ,
-the command is cancelled.
-.SS
-.SP Line:
-Unchanged unless the replacement character is a
-.LI <newline> ,
-in which case it is set to the current line plus
-.LI "count - 1" .
-.SP Column:
-Set to the last character replaced,
-unless the replacement character is a
-.LI <newline> ,
-in which case the cursor is in column 1 of the last line inserted.
-.SP Options:
-None.
-.SE
-.KY s
-.IP "[buffer] [count] s"
-Substitute
-.LI count
-characters in the current line starting with the current character.
-.SS
-.SP Line:
-Set to the last line upon which characters were entered.
-.SP Column:
-Set to the last character entered.
-.SP Options:
-Affected by the
-.OP altwerase ,
-.OP autoindent ,
-.OP beautify ,
-.OP showmatch ,
-.OP ttywerase
-and
-.OP wrapmargin
-options.
-.SE
-.KY t
-.IP "[count] t <character>"
-Search forward,
-.LI count
-times, through the current line for the character immediately
-.i before
-.LI <character> .
-.sp
-The
-.CO t
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the character
-.i before
-the searched-for character.
-.SP Options:
-None.
-.SE
-.KY u
-.IP "u"
-Undo the last change made to the file.
-If repeated, the
-.CO u
-command alternates between these two states, and is its own inverse.
-When used after an insert that inserted text on more than one line,
-the lines are saved in the numeric buffers.
-.sp
-The
-.CO \&.
-command, when used immediately after the
-.CO u
-command, causes the change log to be rolled forward or backward,
-depending on the action of the
-.CO u
-command.
-.SS
-.SP Line:
-Set to the position of the first line changed, if the reversal affects
-only one line or represents an addition or change; otherwise, the line
-preceding the deleted text.
-.SP Column:
-Set to the cursor position before the change was made.
-.SP Options:
-None.
-.SE
-.KY w
-.IP "[count] w"
-Move forward
-.LI count
-words.
-Move the cursor forward to the beginning of a word by repeating the
-following algorithm: if the current position is at the
-beginning of a word, move to the first character of the next word.
-If no subsequent word exists on the current line, move to the first
-character of the first word on the first following line that contains
-a word.
-.sp
-The
-.CO w
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-.SS
-.SP Line:
-Set to the line containing the word selected.
-.SP Column:
-Set to the first character of the word selected.
-.SP Options:
-None.
-.SE
-.KY x
-.IP "[buffer] [count] x"
-Delete
-.LI count
-characters.
-The deletion is at the current character position.
-If the number of characters to be deleted is greater than or equal to
-the number of characters to the end of the line, all of the characters
-from the current cursor position to the end of the line are deleted.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Unchanged unless the last character in the line is deleted and the cursor
-is not already on the first character in the line, in which case it is
-set to the previous character.
-.SP Options:
-None.
-.SE
-.KY y
-.IP "[buffer] [count] y motion"
-Copy (or
-.QQ yank )
-the text region specified by the
-.LI count
-and
-.LI motion ,
-into a buffer.
-.SS
-.SP Line:
-Unchanged, unless the region covers more than a single line,
-in which case it is set to the line where the region starts.
-.SP Column:
-Unchanged, unless the region covers more than a single line,
-in which case it is set to the character were the region starts.
-.SP Options:
-None.
-.SE
-.KY z
-.IP "[count1] z [count2] type"
-Redraw the screen with a window
-.LI count2
-lines long, with line
-.LI count1
-placed as specified by the
-.LI type
-character.
-If
-.LI count1
-is not specified, it defaults to the current line.
-If
-.LI count2
-is not specified, it defaults to the current window size.
-.sp
-The following
-.LI type
-characters may be used:
-.SS
-.SP +
-If
-.LI count1
-is specified, place the line
-.LI count1
-at the top of the screen.
-Otherwise, display the screen after the current screen, similarly to the
-.CO <control-F>
-command.
-.SP <carriage-return>
-Place the line
-.LI count1
-at the top of the screen.
-.SP \&.
-Place the line
-.LI count1
-in the center of the screen.
-.SP \-
-Place the line
-.LI count1
-at the bottom of the screen.
-.SP ^
-If
-.LI count1
-is specified, place the line that is at the top of the screen
-when
-.LI count1
-is at the bottom of the screen, at the bottom of the screen,
-i.e. display the screen before the screen before
-.LI count1 .
-Otherwise, display the screen before the current screen, similarly to the
-.CO <control-B>
-command.
-.SE
-.SS
-.SP Line:
-Set to
-.LI count1
-unless
-.LI count1
-is not specified and the
-.LI type
-character was either
-.QT ^
-or
-.QT + ,
-in which case it is set to the line before the first line on the
-previous screen or the line after the last line on the previous
-screen, respectively.
-.SP Column:
-Set to the first nonblank character in the line.
-.SP Options:
-None.
-.SE
-.KY {
-.IP "[count] {"
-Move backward
-.LI count
-paragraphs.
-.sp
-The
-.CO {
-command is an absolute movement.
-The
-.CO {
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented, unless the starting character is the first
-character on its line, in which case it is line oriented.
-.SS
-.SP Line:
-Set to the line containing the beginning of the previous paragraph.
-.SP Column:
-Set to the first nonblank character in the line.
-.SP Options:
-Affected by the
-.OP paragraph
-option.
-.SE
-.KY |
-.IP "[count] |"
-Move to a specific
-.i column
-position on the current line.
-.sp
-The
-.CO |
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented.
-It is an error to use the
-.CO |
-command as a motion component and for the cursor not to move.
-.SS
-.SP Line:
-Unchanged.
-.SP Column:
-Set to the character occupying the column position identified by
-.LI count ,
-if the position exists in the line.
-If the column length of the current line is less than
-.LI count ,
-the cursor is moved to the last character in the line.
-.SP Options:
-None.
-.SE
-.KY }
-.IP "[count] }"
-Move forward
-.LI count
-paragraphs.
-.sp
-The
-.CO }
-command is an absolute movement.
-The
-.CO }
-command may be used as the motion component of other
-.CO vi
-commands, in which case any text copied into a buffer is
-character oriented, unless the starting character is at or
-before any nonblank characters in its line,
-in which case it is line oriented.
-.SS
-.SP Line:
-Set to the line containing the beginning of the next paragraph.
-.SP Column:
-Set to the first nonblank character in the line.
-.SP Options:
-Affected by the
-.OP paragraph
-option.
-.SE
-.KY ~
-.IP "[count] ~"
-Reverse the case of the next
-.LI count
-character(s).
-This is the historic semantic for the
-.CO ~
-command and it is only in effect if the
-.OP tildeop
-option is not set.
-.sp
-Lowercase alphabetic characters are changed to uppercase,
-and uppercase characters are changed to lowercase.
-No other characters are affected.
-.sp
-Historically, the
-.CO ~
-command did not take an associated count, nor did it move past the
-end of the current line.
-As it had no associated motion it was difficult to change the case
-of large blocks of text.
-In
-.CO nvi ,
-if the cursor is on the last character of a line, and there are
-more lines in the file, the cursor moves to the next line.
-.sp
-It is not an error to specify a count larger than the number of
-characters between the cursor and the end of the file.
-.SS
-.SP Line:
-Set to the line of the character after
-.LI count
-characters, or, end of file.
-.SP Column:
-Set to the character after
-.LI count
-characters, or, end-of-file.
-.SP Options:
-Affected by the
-.OP tildeop
-option.
-.SE
-.KY ~
-.IP "[count] ~ motion"
-Reverse the case of the characters in a text region specified by the
-.LI count
-and
-.LI motion .
-Only in effect if the
-.OP tildeop
-option is set.
-.sp
-Lowercase characters are changed to uppercase,
-and uppercase characters are changed to lowercase.
-No other characters are affected.
-.SS
-.SP Line:
-Set to the line of the character after the last character in the region.
-.SP Column:
-Set to the character after the last character in the region.
-.SP Options:
-Affected by the
-.OP tildeop
-option.
-.SE
-.KY <interrupt>
-.IP "<interrupt>"
-Interrupt the current operation.
-Many of the potentially long-running
-.CO vi
-commands may be interrupted using the terminal interrupt character.
-These operations include searches, file reading and writing, filter
-operations and map character expansion.
-Interrupts are also enabled when running commands outside of
-.CO vi .
-.sp
-If the
-.LI <interrupt>
-character is used to interrupt while entering an
-.CO ex
-command, the command is aborted, the cursor returns to its previous
-position, and
-.CO vi
-remains in command mode.
-.sp
-Generally, if the
-.LI <interrupt>
-character is used to interrupt any
-operation, any changes made before the interrupt are left in place.
-.SS
-.SP Line:
-Dependent on the operation being interrupted.
-.SP Column:
-Dependent on the operation being interrupted.
-.SP Options:
-None.
-.SH 1 "Vi Text Input Commands"
-.pp
-The following section describes the commands available in the text
-input mode of the
-.CO vi
-editor.
-.pp
-Historically,
-.CO vi
-implementations only permitted the characters inserted on the current
-line to be erased.
-In addition, only the
-.LI <control-D>
-erase character and the
-.QT 0<control-D>
-and
-.QT ^<control-D>
-erase strings could erase autoindent characters.
-(Autoindent characters include both the characters inserted automatically
-at the beginning of an input line as well as characters inserted using the
-.LI <control-T>
-command.)
-This implementation permits erasure to continue past the beginning
-of the current line, and back to where text input mode was entered.
-In addition, autoindent characters may be erased using the standard
-erase characters.
-For the line and word erase characters, reaching the autoindent
-characters forms a
-.QQ soft
-boundary, denoting the end of the current word or line erase.
-Repeating the word or line erase key will erase the autoindent characters.
-.pp
-Historically,
-.CO vi
-always used
-.LI <control-H>
-and
-.LI <control-W>
-as character and word erase characters, respectively, regardless of
-the current terminal settings.
-This implementation accepts, in addition to these two characters,
-the current terminal characters for those operations.
-.KY <nul>
-.IP "<nul>"
-If the first character of the input is a
-.LI <nul> ,
-the previous input is replayed, as if just entered.
-.KY <control-D>
-.IP "<control-D>"
-If the previous character on the line was an autoindent character,
-erase characters to move the cursor back to the column immediately
-after the previous (1-based) column which is a multiple of the
-.OP shiftwidth
-edit option.
-This may result in any number of
-.LI <tab>
-and
-.LI <space>
-characters preceding the cursor being changed.
-.sp
-Otherwise, if the
-.OP autoindent
-option is set and the user is entering the first character in the line,
-.LI <control-D>
-is ignored.
-Otherwise, a literal
-.LI <control-D>
-character is entered.
-.KY ^<control-D>
-.IP "^<control-D>"
-If the previous character on the line was an autoindent character,
-erase all of the autoindent characters on the line.
-In addition, the autoindent level is reset to 0.
-.KY 0<control-D>
-.IP "0<control-D>"
-If the previous character on the line was an autoindent character,
-erase all of the autoindent characters on the line.
-The autoindent level is not altered.
-.KY <control-T>
-.IP "<control-T>"
-Insert sufficient
-.LI <tab>
-and
-.LI <space>
-characters to move the cursor forward to the column immediately
-after the next (1-based) column which is a multiple of the
-.OP shiftwidth
-edit option.
-This may result in any number of
-.LI <tab>
-and
-.LI <space>
-characters preceding the cursor being changed.
-.sp
-Historically,
-.CO vi
-did not permit the
-.LI <control-T>
-command to be used unless the cursor was at the first column of a new
-line or it was preceded only by autoindent characters.
-.CO Nvi
-permits it to be used at any time during insert mode.
-.KY <erase>
-.IP <erase>
-.KY <control-H>
-.Ip <control-H>
-Erase the last character.
-.KY "<literal-next>"
-.IP "<literal-next>"
-Quote the next character.
-The next character will not be mapped (see the
-.CO map
-command for more information)
-or interpreted specially.
-A carat
-.PQ ^
-character will be displayed immediately as a placeholder,
-but will be replaced by the next character.
-.KY <escape>
-.IP <escape>
-If on the colon command line, and the
-.OP filec
-edit option is set, behave as described for that option.
-Otherwise, if on the colon command line,
-execute the command.
-Otherwise, if not on the colon command line,
-resolve all text input into the file, and return to command mode.
-.KY "<line erase>"
-.IP "<line erase>"
-Erase the current line.
-.KY "<control-W>"
-.IP "<control-W>"
-.KY "<word erase>"
-.Ip "<word erase>"
-Erase the last word.
-The definition of word is dependent on the
-.OP altwerase
-and
-.OP ttywerase
-options.
-.KY "<control-X>"
-.IP "<control-X>[0-9A-Fa-f]+"
-Insert a character with the specified hexadecimal value into the text.
-The value is delimited by any non-hexadecimal character or the input
-of the maximum number of characters that can be translated into a single
-character value.
-.KY <interrupt>
-.IP "<interrupt>"
-Interrupt text input mode, returning to command mode.
-If the
-.LI <interrupt>
-character is used to interrupt inserting text into the file,
-it is as if the
-.LI <escape>
-character was used; all text input up to the interruption is
-resolved into the file.