.\"***************************************************************************
-.\" Copyright (c) 2017-2019,2020 Free Software Foundation, Inc. *
+.\" Copyright 2018-2020,2021 Thomas E. Dickey *
+.\" Copyright 2017 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: user_caps.5,v 1.11 2020/01/19 02:01:39 tom Exp $
+.\" $Id: user_caps.5,v 1.17 2021/06/17 21:30:22 tom Exp $
.TH user_caps 5
.ie \n(.g .ds `` \(lq
.el .ds `` ``
The memory lock/unlock capabilities were included because they were used
in the X11R6 terminal description for \fBxterm\fP.
The \fIbox1\fP capability is used in @TIC@ to help with terminal descriptions
-written for AIX.
+written for AIX.
.PP
During the 1990s, some users were reluctant to use terminfo
in spite of its performance advantages over termcap:
ask \fBkey_defined\fP(3X) for the \fIkey-code\fP which
would be returned for those keys by \fBwgetch\fP(3X).
.PP
+.\"
.SH PORTABILITY
.PP
The \*(``\-x\*('' extension feature of \fB@TIC@\fP and \fB@INFOCMP@\fP
has been adopted in NetBSD curses.
That implementation stores user-defined capabilities,
but makes no use of these capabilities itself.
+.\"
.SH SEE ALSO
.PP
-\fB@TIC@\fR(1M),
-\fB@INFOCMP@\fR(1M).
+\fB@INFOCMP@\fR(1M),
+\fB@TIC@\fR(1M).
+.PP
+The terminal database section
+.I "NCURSES USER-DEFINABLE CAPABILITIES"
+summarizes commonly-used user-defined capabilities
+which are used in the terminal descriptions.
+Some of those features are mentioned in \fBscreen\fR(1) or \fBtmux\fR(1).
+.PP
+.I "XTerm Control Sequences"
+provides further information on the \fBxterm\fP features
+which are used in these extended capabilities.
+.\"
.SH AUTHORS
.PP
Thomas E. Dickey