===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/less/less.1,v
retrieving revision 1.35
retrieving revision 1.36
diff -u -r1.35 -r1.36
--- src/usr.bin/less/less.1	2014/05/01 18:53:22	1.35
+++ src/usr.bin/less/less.1	2014/05/01 18:59:15	1.36
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: less.1,v 1.35 2014/05/01 18:53:22 jmc Exp $
+.\"	$OpenBSD: less.1,v 1.36 2014/05/01 18:59:15 jmc Exp $
 .\"
 .\" Copyright (C) 1984-2012  Mark Nudelman
 .\"
@@ -81,377 +81,7 @@
 Commands may be preceded by a decimal number,
 called N in the descriptions below.
 The number is used by some commands, as indicated.
-.Sh COMMANDS
-In the following descriptions, ^X means control-X.
-ESC stands for the ESCAPE key; for example ESC-v means the
-two character sequence "ESCAPE", then "v".
-.Bl -tag -width XXXX
-.It Ic h | H
-Help: display a summary of these commands.
-If you forget all the other commands, remember this one.
-.It Ic SPACE | ^V | f | ^F
-Scroll forward N lines, default one window (see option -z below).
-If N is more than the screen size, only the final screenful is displayed.
-Warning: some systems use ^V as a special literalization character.
-.It Ic z
-Like SPACE, but if N is specified, it becomes the new window size.
-.It Ic ESC-SPACE
-Like SPACE, but scrolls a full screenful, even if it reaches
-end-of-file in the process.
-.It Ic ENTER | RETURN | ^N | e | ^E | j | ^J
-Scroll forward N lines, default 1.
-The entire N lines are displayed, even if N is more than the screen size.
-.It Ic d | ^D
-Scroll forward N lines, default one half of the screen size.
-If N is specified, it becomes the new default for subsequent d and u commands.
-.It Ic b | ^B | ESC-v
-Scroll backward N lines, default one window (see option -z below).
-If N is more than the screen size, only the final screenful is displayed.
-.It Ic w
-Like ESC-v, but if N is specified, it becomes the new window size.
-.It Ic y | ^Y | ^P | k | ^K
-Scroll backward N lines, default 1.
-The entire N lines are displayed, even if N is more than the screen size.
-Warning: some systems use ^Y as a special job control character.
-.It Ic u | ^U
-Scroll backward N lines, default one half of the screen size.
-If N is specified, it becomes the new default for subsequent d and u commands.
-.It Ic ESC-) | RIGHTARROW
-Scroll horizontally right N characters, default half the screen width
-(see the -# option).
-If a number N is specified, it becomes the default for future
-RIGHTARROW and LEFTARROW commands.
-While the text is scrolled, it acts as though the -S option (chop lines)
-were in effect.
-.It Ic ESC-( | LEFTARROW
-Scroll horizontally left N
-characters, default half the screen width (see the -# option).
-If a number N is specified, it becomes the default for future
-RIGHTARROW and LEFTARROW commands.
-.It Ic r | ^R | ^L
-Repaint the screen.
-.It Ic R
-Repaint the screen, discarding any buffered input.
-Useful if the file is changing while it is being viewed.
-.It Ic F
-Scroll forward, and keep trying to read when the end of file is reached.
-Normally this command would be used when already at the end of the file.
-It is a way to monitor the tail of a file which is growing
-while it is being viewed.
-(The behavior is similar to the "tail -f" command.)
-.It Ic ESC-F
-Like F, but as soon as a line is found which matches
-the last search pattern, the terminal bell is rung
-and forward scrolling stops.
-.It Ic g | < | ESC-<
-Go to line N in the file, default 1 (beginning of file).
-(Warning: this may be slow if N is large.)
-.It Ic G | > | ESC->
-Go to line N in the file, default the end of the file.
-(Warning: this may be slow if N is large,
-or if N is not specified and standard input, rather than a file,
-is being read.)
-.It Ic p | %
-Go to a position N percent into the file.
-N should be between 0 and 100, and may contain a decimal point.
-.It Ic P
-Go to the line containing byte offset N in the file.
-.It Ic {
-If a left curly bracket appears in the top line displayed
-on the screen, the { command will go to the matching right curly bracket.
-The matching right curly bracket is positioned on the bottom
-line of the screen.
-If there is more than one left curly bracket on the top line, a number N
-may be used to specify the N-th bracket on the line.
-.It Ic }
-If a right curly bracket appears in the bottom line displayed on the screen,
-the } command will go to the matching left curly bracket.
-The matching left curly bracket is positioned on the top
-line of the screen.
-If there is more than one right curly bracket on the top line,
-a number N may be used to specify the N-th bracket on the line.
-.It Ic \&(
-Like {, but applies to parentheses rather than curly brackets.
-.It Ic \&)
-Like }, but applies to parentheses rather than curly brackets.
-.It Ic \&[
-Like {, but applies to square brackets rather than curly brackets.
-.It Ic \&]
-Like }, but applies to square brackets rather than curly brackets.
-.It Ic ESC-^F
-Followed by two characters, acts like {,
-but uses the two characters as open and close brackets, respectively.
-For example, "ESC ^F < >" could be used to
-go forward to the > which matches the < in the top displayed line.
-.It Ic ESC-^B
-Followed by two characters, acts like },
-but uses the two characters as open and close brackets, respectively.
-For example, "ESC ^B < >" could be used to
-go backward to the < which matches the > in the bottom displayed line.
-.It Ic m
-Followed by any lowercase letter, marks the current position with that letter.
-.It Ic '
-(Single quote.)
-Followed by any lowercase letter, returns to the position which
-was previously marked with that letter.
-Followed by another single quote, returns to the position at
-which the last "large" movement command was executed.
-Followed by a ^ or $, jumps to the beginning or end of the file respectively.
-Marks are preserved when a new file is examined,
-so the ' command can be used to switch between input files.
-.It Ic ^X^X
-Same as single quote.
-.It Ic /pattern
-Search forward in the file for the N-th line containing the pattern.
-N defaults to 1.
-The pattern is a regular expression, as recognized by
-the regular expression library supplied by your system.
-The search starts at the first line displayed
-(but see the -a and -j options, which change this).
 .Pp
-Certain characters are special if entered at the beginning of the pattern;
-they modify the type of search rather than become part of the pattern:
-.Bl -tag -width Ds
-.It Ic ^N | \&!
-Search for lines which do NOT match the pattern.
-.It Ic ^E | *
-Search multiple files.
-That is, if the search reaches the END of the current file
-without finding a match,
-the search continues in the next file in the command line list.
-.It Ic ^F | @
-Begin the search at the first line of the FIRST file
-in the command line list,
-regardless of what is currently displayed on the screen
-or the settings of the -a or -j options.
-.It Ic ^K
-Highlight any text which matches the pattern on the current screen,
-but don't move to the first match (KEEP current position).
-.It Ic ^R
-Don't interpret regular expression metacharacters;
-that is, do a simple textual comparison.
-.El
-.It Ic ?pattern
-Search backward in the file for the N-th line containing the pattern.
-The search starts at the line immediately before the top line displayed.
-.Pp
-Certain characters are special, as in the / command:
-.Bl -tag -width Ds
-.It Ic ^N | \&!
-Search for lines which do NOT match the pattern.
-.It Ic ^E | *
-Search multiple files.
-That is, if the search reaches the beginning of the current file
-without finding a match,
-the search continues in the previous file in the command line list.
-.It Ic ^F | @
-Begin the search at the last line of the last file
-in the command line list,
-regardless of what is currently displayed on the screen
-or the settings of the -a or -j options.
-.It Ic ^K
-As in forward searches.
-.It Ic ^R
-As in forward searches.
-.El
-.It Ic ESC-/pattern
-Same as "/*".
-.It Ic ESC-?pattern
-Same as "?*".
-.It Ic n
-Repeat previous search, for N-th line containing the last pattern.
-If the previous search was modified by ^N, the search is made for the
-N-th line NOT containing the pattern.
-If the previous search was modified by ^E, the search continues
-in the next (or previous) file if not satisfied in the current file.
-If the previous search was modified by ^R, the search is done
-without using regular expressions.
-There is no effect if the previous search was modified by ^F or ^K.
-.It Ic N
-Repeat previous search, but in the reverse direction.
-.It Ic ESC-n
-Repeat previous search, but crossing file boundaries.
-The effect is as if the previous search were modified by *.
-.It Ic ESC-N
-Repeat previous search, but in the reverse direction
-and crossing file boundaries.
-.It Ic ESC-u
-Undo search highlighting.
-Turn off highlighting of strings matching the current search pattern.
-If highlighting is already off because of a previous ESC-u command,
-turn highlighting back on.
-Any search command will also turn highlighting back on.
-(Highlighting can also be disabled by toggling the -G option;
-in that case search commands do not turn highlighting back on.)
-.It Ic &pattern
-Display only lines which match the pattern;
-lines which do not match the pattern are not displayed.
-If pattern is empty (if you type & immediately followed by ENTER),
-any filtering is turned off, and all lines are displayed.
-While filtering is in effect, an ampersand is displayed at the
-beginning of the prompt,
-as a reminder that some lines in the file may be hidden.
-.Pp
-Certain characters are special as in the / command:
-.Bl -tag -width Ds
-.It Ic ^N | !
-Display only lines which do NOT match the pattern.
-.It Ic ^R
-Don't interpret regular expression metacharacters;
-that is, do a simple textual comparison.
-.El
-.It Ic :e Op Ar filename
-Examine a new file.
-If the filename is missing, the "current" file (see the :n and :p commands
-below) from the list of files in the command line is re-examined.
-A percent sign (%) in the filename is replaced by the name of the
-current file.
-A pound sign (#) is replaced by the name of the previously examined file.
-However, two consecutive percent signs are simply
-replaced with a single percent sign.
-This allows you to enter a filename that contains a percent sign
-in the name.
-Similarly, two consecutive pound signs are replaced with a single pound sign.
-The filename is inserted into the command line list of files
-so that it can be seen by subsequent :n and :p commands.
-If the filename consists of several files, they are all inserted into
-the list of files and the first one is examined.
-If the filename contains one or more spaces,
-the entire filename should be enclosed in double quotes
-(also see the -" option).
-.It Ic ^X^V | E
-Same as :e.
-Warning: some systems use ^V as a special literalization character.
-On such systems, you may not be able to use ^V.
-.It Ic :n
-Examine the next file (from the list of files given in the command line).
-If a number N is specified, the N-th next file is examined.
-.It Ic :p
-Examine the previous file in the command line list.
-If a number N is specified, the N-th previous file is examined.
-.It Ic :t
-Go to the specified tag.
-.It Ic :x
-Examine the first file in the command line list.
-If a number N is specified, the N-th file in the list is examined.
-.It Ic :d
-Remove the current file from the list of files.
-.It Ic t
-Go to the next tag, if there were more than one matches for the current tag.
-See the \-t option for more details about tags.
-.It Ic T
-Go to the previous tag, if there were more than one matches for the current tag.
-.It Ic = | ^G | :f
-Prints some information about the file being viewed, including its name
-and the line number and byte offset of the bottom line being displayed.
-If possible, it also prints the length of the file,
-the number of lines in the file
-and the percent of the file above the last displayed line.
-.It Ic \-
-Followed by one of the command line option letters (see
-.Sx OPTIONS
-below),
-this will change the setting of that option
-and print a message describing the new setting.
-If a ^P (CONTROL-P) is entered immediately after the dash,
-the setting of the option is changed but no message is printed.
-If the option letter has a numeric value (such as -b or -h),
-or a string value (such as -P or -t),
-a new value may be entered after the option letter.
-If no new value is entered, a message describing
-the current setting is printed and nothing is changed.
-.It Ic \-\-
-Like the \- command, but takes a long option name (see
-.Sx OPTIONS
-below)
-rather than a single option letter.
-You must press ENTER or RETURN after typing the option name.
-A ^P immediately after the second dash suppresses printing of a
-message describing the new setting, as in the \- command.
-.It Ic \-+
-Followed by one of the command line option letters this will reset the
-option to its default setting and print a message describing the new setting.
-(The "\-+X" command does the same thing as "\-+X" on the command line.)
-This does not work for string-valued options.
-.It Ic \-\-+
-Like the \-+ command, but takes a long option name
-rather than a single option letter.
-.It Ic \-!
-Followed by one of the command line option letters, this will reset the
-option to the "opposite" of its default setting and print a message
-describing the new setting.
-This does not work for numeric or string-valued options.
-.It Ic \-\-!
-Like the \-! command, but takes a long option name
-rather than a single option letter.
-.It Ic _
-(Underscore.)
-Followed by one of the command line option letters,
-this will print a message describing the current setting of that option.
-The setting of the option is not changed.
-.It Ic __
-(Double underscore.)
-Like the _ (underscore) command, but takes a long option name
-rather than a single option letter.
-You must press ENTER or RETURN after typing the option name.
-.It Ic +cmd
-Causes the specified cmd to be executed each time a new file is examined.
-For example, +G causes
-.Nm
-to initially display each file starting at the end rather than the beginning.
-.It Ic V
-Prints the version number of
-.Nm
-being run.
-.It Ic q | Q | :q | :Q | ZZ
-Exits
-.Nm less .
-.El
-.Pp
-The following
-four
-commands may or may not be valid, depending on your particular installation.
-.Bl -tag -width XXXX
-.It Ic v
-Invokes an editor to edit the current file being viewed.
-The editor is taken from the environment variable
-.Ev VISUAL ,
-if defined,
-or
-.Ev EDITOR
-if
-.Ev VISUAL
-is not defined,
-or defaults to "vi" if neither
-.Ev VISUAL
-nor
-.Ev EDITOR
-is defined.
-See also the discussion of LESSEDIT under the section on
-.Sx PROMPTS
-below.
-.It Ic \&! Ar shell-command
-Invokes a shell to run the shell-command given.
-A percent sign (%) in the command is replaced by the name of the current file.
-A pound sign (#) is replaced by the name of the previously examined file.
-"!!" repeats the last shell command.
-"!" with no shell command simply invokes a shell.
-The shell is taken from the environment variable
-.Ev SHELL ,
-or defaults to "sh".
-.\" On MS-DOS and OS/2 systems, the shell is the normal command processor.
-.It Ic | <m> Ar shell-command
-<m> represents any mark letter.
-Pipes a section of the input file to the given shell command.
-The section of the file to be piped is between the first line on
-the current screen and the position marked by the letter.
-<m> may also be ^ or $ to indicate beginning or end of file respectively.
-If <m> is . or newline, the current screen is piped.
-.It Ic s Ar filename
-Save the input to a file.
-This only works if the input is a pipe, not an ordinary file.
-.El
-.Sh OPTIONS
 Command line options are described below.
 Most options may be changed while
 .Nm
@@ -515,6 +145,8 @@
 If the --use-backslash option is not in effect, then backslashes are
 not treated specially, and there is no way to include a dollar sign
 in the option string.
+.Pp
+The options are as follows:
 .Bl -tag -width XXXX
 .It Fl \&? | -help
 This option displays a summary of the commands accepted by
@@ -1032,6 +664,376 @@
 every file being viewed, not just the first one.
 The + command described previously
 may also be used to set (or change) an initial command for every file.
+.El
+.Sh COMMANDS
+In the following descriptions, ^X means control-X.
+ESC stands for the ESCAPE key; for example ESC-v means the
+two character sequence "ESCAPE", then "v".
+.Bl -tag -width XXXX
+.It Ic h | H
+Help: display a summary of these commands.
+If you forget all the other commands, remember this one.
+.It Ic SPACE | ^V | f | ^F
+Scroll forward N lines, default one window (see option -z below).
+If N is more than the screen size, only the final screenful is displayed.
+Warning: some systems use ^V as a special literalization character.
+.It Ic z
+Like SPACE, but if N is specified, it becomes the new window size.
+.It Ic ESC-SPACE
+Like SPACE, but scrolls a full screenful, even if it reaches
+end-of-file in the process.
+.It Ic ENTER | RETURN | ^N | e | ^E | j | ^J
+Scroll forward N lines, default 1.
+The entire N lines are displayed, even if N is more than the screen size.
+.It Ic d | ^D
+Scroll forward N lines, default one half of the screen size.
+If N is specified, it becomes the new default for subsequent d and u commands.
+.It Ic b | ^B | ESC-v
+Scroll backward N lines, default one window (see option -z below).
+If N is more than the screen size, only the final screenful is displayed.
+.It Ic w
+Like ESC-v, but if N is specified, it becomes the new window size.
+.It Ic y | ^Y | ^P | k | ^K
+Scroll backward N lines, default 1.
+The entire N lines are displayed, even if N is more than the screen size.
+Warning: some systems use ^Y as a special job control character.
+.It Ic u | ^U
+Scroll backward N lines, default one half of the screen size.
+If N is specified, it becomes the new default for subsequent d and u commands.
+.It Ic ESC-) | RIGHTARROW
+Scroll horizontally right N characters, default half the screen width
+(see the -# option).
+If a number N is specified, it becomes the default for future
+RIGHTARROW and LEFTARROW commands.
+While the text is scrolled, it acts as though the -S option (chop lines)
+were in effect.
+.It Ic ESC-( | LEFTARROW
+Scroll horizontally left N
+characters, default half the screen width (see the -# option).
+If a number N is specified, it becomes the default for future
+RIGHTARROW and LEFTARROW commands.
+.It Ic r | ^R | ^L
+Repaint the screen.
+.It Ic R
+Repaint the screen, discarding any buffered input.
+Useful if the file is changing while it is being viewed.
+.It Ic F
+Scroll forward, and keep trying to read when the end of file is reached.
+Normally this command would be used when already at the end of the file.
+It is a way to monitor the tail of a file which is growing
+while it is being viewed.
+(The behavior is similar to the "tail -f" command.)
+.It Ic ESC-F
+Like F, but as soon as a line is found which matches
+the last search pattern, the terminal bell is rung
+and forward scrolling stops.
+.It Ic g | < | ESC-<
+Go to line N in the file, default 1 (beginning of file).
+(Warning: this may be slow if N is large.)
+.It Ic G | > | ESC->
+Go to line N in the file, default the end of the file.
+(Warning: this may be slow if N is large,
+or if N is not specified and standard input, rather than a file,
+is being read.)
+.It Ic p | %
+Go to a position N percent into the file.
+N should be between 0 and 100, and may contain a decimal point.
+.It Ic P
+Go to the line containing byte offset N in the file.
+.It Ic {
+If a left curly bracket appears in the top line displayed
+on the screen, the { command will go to the matching right curly bracket.
+The matching right curly bracket is positioned on the bottom
+line of the screen.
+If there is more than one left curly bracket on the top line, a number N
+may be used to specify the N-th bracket on the line.
+.It Ic }
+If a right curly bracket appears in the bottom line displayed on the screen,
+the } command will go to the matching left curly bracket.
+The matching left curly bracket is positioned on the top
+line of the screen.
+If there is more than one right curly bracket on the top line,
+a number N may be used to specify the N-th bracket on the line.
+.It Ic \&(
+Like {, but applies to parentheses rather than curly brackets.
+.It Ic \&)
+Like }, but applies to parentheses rather than curly brackets.
+.It Ic \&[
+Like {, but applies to square brackets rather than curly brackets.
+.It Ic \&]
+Like }, but applies to square brackets rather than curly brackets.
+.It Ic ESC-^F
+Followed by two characters, acts like {,
+but uses the two characters as open and close brackets, respectively.
+For example, "ESC ^F < >" could be used to
+go forward to the > which matches the < in the top displayed line.
+.It Ic ESC-^B
+Followed by two characters, acts like },
+but uses the two characters as open and close brackets, respectively.
+For example, "ESC ^B < >" could be used to
+go backward to the < which matches the > in the bottom displayed line.
+.It Ic m
+Followed by any lowercase letter, marks the current position with that letter.
+.It Ic '
+(Single quote.)
+Followed by any lowercase letter, returns to the position which
+was previously marked with that letter.
+Followed by another single quote, returns to the position at
+which the last "large" movement command was executed.
+Followed by a ^ or $, jumps to the beginning or end of the file respectively.
+Marks are preserved when a new file is examined,
+so the ' command can be used to switch between input files.
+.It Ic ^X^X
+Same as single quote.
+.It Ic /pattern
+Search forward in the file for the N-th line containing the pattern.
+N defaults to 1.
+The pattern is a regular expression, as recognized by
+the regular expression library supplied by your system.
+The search starts at the first line displayed
+(but see the -a and -j options, which change this).
+.Pp
+Certain characters are special if entered at the beginning of the pattern;
+they modify the type of search rather than become part of the pattern:
+.Bl -tag -width Ds
+.It Ic ^N | \&!
+Search for lines which do NOT match the pattern.
+.It Ic ^E | *
+Search multiple files.
+That is, if the search reaches the END of the current file
+without finding a match,
+the search continues in the next file in the command line list.
+.It Ic ^F | @
+Begin the search at the first line of the FIRST file
+in the command line list,
+regardless of what is currently displayed on the screen
+or the settings of the -a or -j options.
+.It Ic ^K
+Highlight any text which matches the pattern on the current screen,
+but don't move to the first match (KEEP current position).
+.It Ic ^R
+Don't interpret regular expression metacharacters;
+that is, do a simple textual comparison.
+.El
+.It Ic ?pattern
+Search backward in the file for the N-th line containing the pattern.
+The search starts at the line immediately before the top line displayed.
+.Pp
+Certain characters are special, as in the / command:
+.Bl -tag -width Ds
+.It Ic ^N | \&!
+Search for lines which do NOT match the pattern.
+.It Ic ^E | *
+Search multiple files.
+That is, if the search reaches the beginning of the current file
+without finding a match,
+the search continues in the previous file in the command line list.
+.It Ic ^F | @
+Begin the search at the last line of the last file
+in the command line list,
+regardless of what is currently displayed on the screen
+or the settings of the -a or -j options.
+.It Ic ^K
+As in forward searches.
+.It Ic ^R
+As in forward searches.
+.El
+.It Ic ESC-/pattern
+Same as "/*".
+.It Ic ESC-?pattern
+Same as "?*".
+.It Ic n
+Repeat previous search, for N-th line containing the last pattern.
+If the previous search was modified by ^N, the search is made for the
+N-th line NOT containing the pattern.
+If the previous search was modified by ^E, the search continues
+in the next (or previous) file if not satisfied in the current file.
+If the previous search was modified by ^R, the search is done
+without using regular expressions.
+There is no effect if the previous search was modified by ^F or ^K.
+.It Ic N
+Repeat previous search, but in the reverse direction.
+.It Ic ESC-n
+Repeat previous search, but crossing file boundaries.
+The effect is as if the previous search were modified by *.
+.It Ic ESC-N
+Repeat previous search, but in the reverse direction
+and crossing file boundaries.
+.It Ic ESC-u
+Undo search highlighting.
+Turn off highlighting of strings matching the current search pattern.
+If highlighting is already off because of a previous ESC-u command,
+turn highlighting back on.
+Any search command will also turn highlighting back on.
+(Highlighting can also be disabled by toggling the -G option;
+in that case search commands do not turn highlighting back on.)
+.It Ic &pattern
+Display only lines which match the pattern;
+lines which do not match the pattern are not displayed.
+If pattern is empty (if you type & immediately followed by ENTER),
+any filtering is turned off, and all lines are displayed.
+While filtering is in effect, an ampersand is displayed at the
+beginning of the prompt,
+as a reminder that some lines in the file may be hidden.
+.Pp
+Certain characters are special as in the / command:
+.Bl -tag -width Ds
+.It Ic ^N | !
+Display only lines which do NOT match the pattern.
+.It Ic ^R
+Don't interpret regular expression metacharacters;
+that is, do a simple textual comparison.
+.El
+.It Ic :e Op Ar filename
+Examine a new file.
+If the filename is missing, the "current" file (see the :n and :p commands
+below) from the list of files in the command line is re-examined.
+A percent sign (%) in the filename is replaced by the name of the
+current file.
+A pound sign (#) is replaced by the name of the previously examined file.
+However, two consecutive percent signs are simply
+replaced with a single percent sign.
+This allows you to enter a filename that contains a percent sign
+in the name.
+Similarly, two consecutive pound signs are replaced with a single pound sign.
+The filename is inserted into the command line list of files
+so that it can be seen by subsequent :n and :p commands.
+If the filename consists of several files, they are all inserted into
+the list of files and the first one is examined.
+If the filename contains one or more spaces,
+the entire filename should be enclosed in double quotes
+(also see the -" option).
+.It Ic ^X^V | E
+Same as :e.
+Warning: some systems use ^V as a special literalization character.
+On such systems, you may not be able to use ^V.
+.It Ic :n
+Examine the next file (from the list of files given in the command line).
+If a number N is specified, the N-th next file is examined.
+.It Ic :p
+Examine the previous file in the command line list.
+If a number N is specified, the N-th previous file is examined.
+.It Ic :t
+Go to the specified tag.
+.It Ic :x
+Examine the first file in the command line list.
+If a number N is specified, the N-th file in the list is examined.
+.It Ic :d
+Remove the current file from the list of files.
+.It Ic t
+Go to the next tag, if there were more than one matches for the current tag.
+See the \-t option for more details about tags.
+.It Ic T
+Go to the previous tag, if there were more than one matches for the current tag.
+.It Ic = | ^G | :f
+Prints some information about the file being viewed, including its name
+and the line number and byte offset of the bottom line being displayed.
+If possible, it also prints the length of the file,
+the number of lines in the file
+and the percent of the file above the last displayed line.
+.It Ic \-
+Followed by one of the command line option letters (see
+.Sx OPTIONS
+below),
+this will change the setting of that option
+and print a message describing the new setting.
+If a ^P (CONTROL-P) is entered immediately after the dash,
+the setting of the option is changed but no message is printed.
+If the option letter has a numeric value (such as -b or -h),
+or a string value (such as -P or -t),
+a new value may be entered after the option letter.
+If no new value is entered, a message describing
+the current setting is printed and nothing is changed.
+.It Ic \-\-
+Like the \- command, but takes a long option name (see
+.Sx OPTIONS
+below)
+rather than a single option letter.
+You must press ENTER or RETURN after typing the option name.
+A ^P immediately after the second dash suppresses printing of a
+message describing the new setting, as in the \- command.
+.It Ic \-+
+Followed by one of the command line option letters this will reset the
+option to its default setting and print a message describing the new setting.
+(The "\-+X" command does the same thing as "\-+X" on the command line.)
+This does not work for string-valued options.
+.It Ic \-\-+
+Like the \-+ command, but takes a long option name
+rather than a single option letter.
+.It Ic \-!
+Followed by one of the command line option letters, this will reset the
+option to the "opposite" of its default setting and print a message
+describing the new setting.
+This does not work for numeric or string-valued options.
+.It Ic \-\-!
+Like the \-! command, but takes a long option name
+rather than a single option letter.
+.It Ic _
+(Underscore.)
+Followed by one of the command line option letters,
+this will print a message describing the current setting of that option.
+The setting of the option is not changed.
+.It Ic __
+(Double underscore.)
+Like the _ (underscore) command, but takes a long option name
+rather than a single option letter.
+You must press ENTER or RETURN after typing the option name.
+.It Ic +cmd
+Causes the specified cmd to be executed each time a new file is examined.
+For example, +G causes
+.Nm
+to initially display each file starting at the end rather than the beginning.
+.It Ic V
+Prints the version number of
+.Nm
+being run.
+.It Ic q | Q | :q | :Q | ZZ
+Exits
+.Nm less .
+.El
+.Pp
+The following
+four
+commands may or may not be valid, depending on your particular installation.
+.Bl -tag -width XXXX
+.It Ic v
+Invokes an editor to edit the current file being viewed.
+The editor is taken from the environment variable
+.Ev VISUAL ,
+if defined,
+or
+.Ev EDITOR
+if
+.Ev VISUAL
+is not defined,
+or defaults to "vi" if neither
+.Ev VISUAL
+nor
+.Ev EDITOR
+is defined.
+See also the discussion of LESSEDIT under the section on
+.Sx PROMPTS
+below.
+.It Ic \&! Ar shell-command
+Invokes a shell to run the shell-command given.
+A percent sign (%) in the command is replaced by the name of the current file.
+A pound sign (#) is replaced by the name of the previously examined file.
+"!!" repeats the last shell command.
+"!" with no shell command simply invokes a shell.
+The shell is taken from the environment variable
+.Ev SHELL ,
+or defaults to "sh".
+.\" On MS-DOS and OS/2 systems, the shell is the normal command processor.
+.It Ic | <m> Ar shell-command
+<m> represents any mark letter.
+Pipes a section of the input file to the given shell command.
+The section of the file to be piped is between the first line on
+the current screen and the position marked by the letter.
+<m> may also be ^ or $ to indicate beginning or end of file respectively.
+If <m> is . or newline, the current screen is piped.
+.It Ic s Ar filename
+Save the input to a file.
+This only works if the input is a pipe, not an ordinary file.
 .El
 .Sh LINE EDITING
 When entering command line at the bottom of the screen