(Forcing Redisplay): redisplay-preemption-period

only used on window systems.  Add xref to Terminal Output.

diff --git a/lispref/display.texi b/lispref/display.texi
index 8d91718e0cd149657e47fd0056be01db3421cf0a..4e7ba81ed3babd85f2a9fdd8bf798bb31ff410df 100644 (file)
--- a/lispref/display.texi
+++ b/lispref/display.texi
@@ -103,8 +103,9 @@ processes the available input before trying again to redisplay.
 If this variable is @code{nil}, Emacs does not check for input during
 redisplay, and redisplay cannot be preempted by input.
 
-@emph{Note} that this variable is only available if Emacs is built
-with support for sub-second timers.
+@emph{Note} that this variable is only used on window systems,
+and is only available if Emacs is built with support for sub-second timers.
+For other platforms; @xref{Terminal Output}.
 @end defvar
 
 @defvar redisplay-dont-pause