+.PP
+Some keys may be the same as commonly used control
+keys, e.g.,
+\fBKEY_ENTER\fP versus control/M,
+\fBKEY_BACKSPACE\fP versus control/H.
+Some curses implementations may differ according to whether they
+treat these control keys specially (and ignore the terminfo), or
+use the terminfo definitions.
+\fBNcurses\fR uses the terminfo definition.
+If it says that \fBKEY_ENTER\fP is control/M,
+\fBgetch\fR will return \fBKEY_ENTER\fP
+when you press control/M.
+.PP
+Generally, \fBKEY_ENTER\fP denotes the character(s) sent by the \fIEnter\fP
+key on the numeric keypad:
+.bP
+the terminal description lists the most useful keys,
+.bP
+the \fIEnter\fP key on the regular keyboard is already handled by
+the standard ASCII characters for carriage-return and line-feed,
+.bP
+depending on whether \fBnl\fP or \fBnonl\fP was called,
+pressing "Enter" on the regular keyboard may return either a carriage-return
+or line-feed, and finally
+.bP
+"Enter or send" is the standard description for this key.
+.PP