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.\" Copyright (c) 1980 Regents of the University of California.
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.\" All rights reserved.  The Berkeley software License Agreement
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.\" specifies the terms and conditions for redistribution.
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.\"
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.\"	@(#)vi.1	6.1 (Berkeley) 4/29/85
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.\"
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.\".TH VI 1 "April 29, 1985"
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.TH VI 1 "May 22, 2000"
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.UC
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.SH NAME
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vi \- screen oriented (visual) display editor based on ex
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.SH SYNOPSIS
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.B vi
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[
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.B \-t
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tag
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] [
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.B \-r
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] [
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\fB+\fR\fIcommand\fR
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] [
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.B \-l
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] [
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\fB\-w\fIn\fR
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]
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name ...
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.SH DESCRIPTION
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.I Vi
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(visual) is a display oriented text editor based on
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.IR ex (1).
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.I Ex
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and
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.I vi
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run the same code; it is possible to get to
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the command mode of
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.I ex
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from within
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.I vi
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and vice-versa.
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.PP
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The
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.I "Vi Quick Reference"
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card and the
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.I "Introduction to Display Editing with Vi"
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provide full details on using
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.I vi.
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.SH FILES
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See
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.IR ex (1).
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.SH SEE ALSO
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ex (1), edit (1), ``Vi Quick Reference'' card,
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``An Introduction to Display Editing with Vi''.
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.SH AUTHOR
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William Joy
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.br
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Mark Horton added macros to \fIvisual\fR mode and is maintaining version 3
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.br
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This version was hacked by Gunnar Ritter
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to support ISO-8859 characters.
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.SH BUGS
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Software tabs using \fB^T\fR work only immediately after the
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.I autoindent.
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.PP
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Left and right shifts on intelligent terminals don't make use of
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insert and delete character operations in the terminal.
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.PP
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The
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.I wrapmargin
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option can be fooled since it looks at output columns when blanks are typed.
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If a long word passes through the margin and onto the next line without a
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break, then the line won't be broken.
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.PP
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Insert/delete within a line can be slow if tabs are present on intelligent
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terminals, since the terminals need help in doing this correctly.
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.PP
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Saving text on deletes in the named buffers is somewhat inefficient.
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.PP
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The
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.I source
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command does not work when executed as \fB:source\fR;
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there is no way to use the \fB:append\fR, \fB:change\fR,
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and \fB:insert\fR commands, since it is not possible to give
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more than one line of input to a \fB:\fR escape.  To use these
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on a \fB:global\fR you must \fBQ\fR to \fIex\fR command mode,
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execute them, and then reenter the screen editor with
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.I vi
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or
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.I open.