VI: All help refers to VISUAL mode, unless a preceding colon (:) is specified.
	get this info with :help on PC, or :viusage (on nvi with FreeBSD)
Invocation
	vi file 		; Edit at first line of 'file'
	vi file1 file2		; Edit file1. Edit file2 via :n
	vi [options] file	; As above, but with Command Line Options
Command Line Options
	+n		; Edit at line n
	+		; Edit at last line
	+/pattern	; Edit at line containing 'pattern'
	-R		; open file(s) in read-only mode
	-c		; Use line-oriented command mode
	-e		; ... restricted 'edit' mode.
	-l		; Enable 'lisp' and 'showmatch' options
	-wn		; Specify window size of 'n' lines
	-?		; Print a summary of all command line options
	--		; End processing of command line options
Exiting
	ZZ		; Exit visual mode, saving changes
	:x		; Exit saving changes
	:wq		; Write buffer, then quit.
	:w		; Write buffer to original file
	:w file 	; Write buffer to 'file'
	:w>> file	; Append to 'file'
	:n,mw file	; Write lines 'n' through 'm' to 'file'
	:q		; Quit out of editor
	:q!		; Quit discarding changes
	:e!		; Reedit file, discarding changes
Setting Options
	:set all	; Prints all option settings
	:set option	; Enables option 'option'
	:set nooption	; Disables option 'option'
	:set option?	; Prints current value of 'option'
	:set		; Prints modified options
Text Input
	i		; Insert before cursor
	I		; Insert before first non-blank on line
	a		; Append after cursor
	A		; Append at end of line
	o		; Open and insert at line below
	O		; Open and insert at line above
	ESCape key	; Terminates Input mode.
Insert Mode Commands
	Control-@		; Repeat Last Insertion
	Control-W		; Erase last word entered
	Control-H		; Erase last character entered
	DELete or Backspace	; Same as Control-H
	Control-U		; Erase entire line
	Control-D		; Backtab over 'autoindent'
	0Control-D		; Kill all 'autoindent'
	^Control-D		; Kill 'autoindent' on current line only
	Control-V		; Next character literal(to insert control code)
Screen Adjustment
	Control-L	; Clear and redraw screen
	Control-R	; Redraw only if @ (deleted) lines
	zCR		; Redraw, current line at top of page
	z.		; Redraw, current line at center of page
	z-		; Redraw, current line at bottom of page
	/pattern/z-	; Redraw, line containing 'pattern' at bottom of page
	zn.		; Redraw, set new window size of 'n' lines
	Control-E	; Scroll down 1 line
	Control-Y	; Scroll up 1 line
	Control-F	; Scroll forward one screen
	Control-B	; Scroll backward one screen
	Control-D	; Scroll down half screen
	Control-U	; Scroll up half screen
Cursor Motion
	H		; Move cursor to top of page
	M		; Move cursor to middle of page
	L		; Move cursor to last line of page
	+		; Move cursor to next line at first non-white character
	-		; Move cursor to previous line at first non-white
	down-arrow or j ; Move cursor down one line, staying in same column
	up-arrow or k	; Move cursor up one line, staying in same column
	left-arrow or h ; Move cursor to the left
	right-arrow or l; Move cursor to the right
	0		; Move cursor to beginning of line
	^		; Move cursor to beginning of line (first non-white)
	$		; Move cursor to the end of line
	n|		; Move cursor to column 'n'
	Control-H	; Same as left-arrow
File Motion
	G		; Last line of file
	nG		; Line 'n' of file
	/pattern	; Next line containing 'pattern'
	?pattern	; Previous line containing 'pattern'
	n		; Next / or ?
	N		; previous / or ?
	/pattern/+n	; 'n'th line after line containing 'pattern'
	?pattern?-n	; 'n'th line before line containing 'pattern'
	)		; Next sentence
	(		; Preceding sentence
	}		; Next paragraph
	{		; Preceding paragraph
	]]		; Next section/function
	[[		; Preceding section/function
	``		; Previous context
	''		; Previous context at first non-white in line
Search Patterns
	^		; Beginning of line
	$		; End of line
	.		; Any character
	*		; Zero or more of previous character
	[A-Z]		; Matches any character from A to Z
	[abc]		; Matches a, b, or c
	[^abc]		; Matches any character BUT a, b or c
	\		; escape character for literal: \ / $ . ^ [ ' & * | ~
	\<		; Beginning of word
	\>		; End of word
Marking Position
	mx		; Mark current position with locator 'x'
	`x		; Return to position at locator 'x'
	'x		; ... at first non-white in line
Yank and Put
	yy or Y ; Yank line to buffer
	yw		; Yank word to buffer
	nyy or nY	; Yank 'n' lines to buffer
	p		; Put back lines below cursor
	P		; Put back lines above cursor
	"xy		; Yank line to buffer 'x'
	"xp		; Put from buffer 'x'
Substitution
	stext		; Substitutes 'text' for character until ESCape
	S		; Substitute for entire line until ESCape
	:s/X/Y/opt	; Substitute 'Y' for first occurrence of 'X'
			; Options: g - Change every currence in line
			;	c - Confirm each change
			;	p - Print each change (Command mode only)
	&		; Repeat last :substitute command
	:g/X/s//Y/opt	; Globally find the first 'X' on each line and
			; substitute 'Y' for the string 'X'
Deleting Text
	x		; Delete character under cursor
	nx		; Delete 'n' characters
	X		; Delete character before cursor
	dw		; Delete word
	ndw		; Delete 'n' words
	dd		; Delete entire line
	dtx		; Delete to 'x' in current line
	D		; Delete to end of line
	d/pattern	; Delete up to 'pattern'
	d?pattern	; Delete back to 'pattern'
	d`x		; Delete to marked location 'x'
	d'x		; Delete current line and to line which contains
			; marked location 'x'
	d)		; Delete to end of sentence
	d(		; Delete to beginning of sentence
	d}		; Delete to end of paragraph
	d{		; Delete to beginning of paragraph
	d]]		; Delete to end of section
	d[[		; Delete to beginning of section
Changing Text
	cw		; Change word
	ncw		; Change 'n' words
	cc		; Change entire line
	ncc		; Change 'n' lines
	C		; Change to end of current line
	c/pattern	; Change up to 'pattern'
	c?pattern	; Change back to 'pattern'
	c`x		; Change to marked location 'x'
	c'x		; Change current line and to line which contains
			; marked location 'x'
	c)		; Change to end of sentence
	c(		; Change to beginning of sentence
	c}		; Change to end of paragraph
	c{		; Change to beginning of paragraph
	c]]		; Change to end of section
	c[[		; Change to beginning of section
	rx		; Replace character with 'x'
	R		; Replace all characters until ESCape is entered
Word and Within Line Motions
	w		; Move cursor forward by one word
	W		; ... including any punctuation
	b		; Move cursor backward by one word
	B		; ... including any punctuation
	e		; Move cursor forward to end of word
	E		; ... including any punctuation
	fx		; Search current line (only) forward for 'x'
	Fx		; Search current line (only) backward for 'x'
	;		; Repeat last 'f' or 'F'
	,		; Reverse of last 'f' or 'F'
Undo
	u		; Undo last change
	U		; Restore current line
	"np		; Retrieve from buffer 'n' (1-9 and a-z)
	"n1pu.u.u.u.	; Scan recent deletions
Miscellaneous
	.		; Repeat previous operation
	~		; Reverse case of letter and advance one position
	J		; Join lines together
	<<		; Shift line left one tab position
	>>		; Shift line right one tab position
	:g/pattern/p	; Locate and print all occurrences of 'pattern'
			; within the file.
	xp		; Reverse order of two letters
	dwwP		; Reverse order of two words
	ddp		; Reverse order of two lines