In insert mode, indents each line to the same level as the line above or below. Use with shiftwidth option.

Displays changes after each editor command. (For global replacement, displays last replacement.)

Automatically writes (saves) file if changed before opening another file with :n or before giving UNIX command with :!.

Ignores all control characters during input (except tab, newline, or formfeed).

Names directory in which ex stores buffer files. (Directory must be writable.)

noed-compatible

Uses ed-like features on substitute commands.

Allows the execution of .exrc files that reside outside the user's home directory. (System V only.)

Defines boundaries for terminal hardware tabs.

Disregards case during a search.

Inserts indents in appropriate lisp format. ( ), { }, [[, and ]] are modified to have meaning for lisp.

Prints tabs as ^I; marks ends of lines with $. (Use list to tell if end character is a tab or a space.)

Wildcard characters . (dot), * (asterisk), and [] (brackets) have special meaning in patterns.

Permits system messages to display on terminal while editing in vi.

Displays line numbers on left of screen during editing session.

Allows entry to open or visual mode from ex.

Abolishes carriage returns at the end of lines when printing multiple lines, speeds output on dumb terminals when printing lines with leading white space (blanks or tabs).

=IPLPPPQP LIpplpipbp

Defines paragraph delimiters for movement by { or }. The pairs of characters in the value are the names of nroff/troff macros that begin paragraphs.

Displays the ex prompt (:) when vi's Q command is given.

Any writes (saves) of a file will fail unless you use ! after the write (works with w, ZZ, or autowrite).

Terminal redraws screen whenever edits are made (in other words, insert mode pushes over existing characters, and deleted lines immediately close up). Default depends on line speed and terminal type. noredraw is useful at slow speeds on a dumb terminal: deleted lines show up as @, and inserted text appears to overwrite existing text until you press [ESC].

Allows nested map sequences.

Displays a message on the prompt line whenever you make an edit that affects at least a certain number of lines. For example, 6dd reports the message "6 lines deleted."

Amount of screen to scroll.

Defines section delimiters for [[ ]] movement. The pairs of characters in the value are the names of nroff/troff macros that begin sections.

Pathname of shell used for shell escape (:!) and shell command (:sh). Default value is derived from shell environment, which varies on different systems.

Defines number of spaces in backward (^D) tabs when using the autoindent option.

In vi, when ) or } is entered, cursor moves briefly to matching ( or {. (If match is not on the screen, rings the error message bell.) Very useful for programming.

In insert mode, displays a message on the prompt line indicating the type of insert you are making. For example, "Open Mode," or "Append Mode." (System V only.)

Holds off display during insert. Default depends on line speed and terminal type.

Defines number of spaces that a [TAB] indents during editing session. (Printer still uses system tab of 8.)

Defines number of characters that are significant for tags. Default (zero) means that all characters are significant.

=tags /usr/lib/tags

Defines pathname of files containing tags (see the UNIX ctags command.) (By default, system searches /usr/lib/tags and the file tags in the current directory.)

Displays shorter error messages.

Keyboard maps "time out" after 1 second.[1]

Displays the warning message, "No write since last change."

Shows a certain number of lines of the file on the screen. Default depends on line speed and terminal type.

Searches wrap around either end of file.

Defines right margin. If greater than zero, automatically inserts carriage returns to break lines.