-.B \-fps
-Display a running tally of how many frames per second are being rendered.
-In conjunction with \fB\-delay 0\fP, this can be a useful benchmark of
-your GL performance.
+.B \-program \fIcommand\fP
+The given program is run, and its output is displayed.
+If specified, this overrides \fI\-text\fP.
+The output of this program will be repeatedely displayed, with new
+pages of text shifting in every few seconds. Lines should be relatively
+short. You might try:
+.EX
+-program 'xscreensaver-text --cols 20'
+.EE
+.TP 8
+.B \-maxlines
+Set the number of lines of text to display. By default,
+.I gltext
+will print 8 lines of text at a time. Use this option to increase or
+decrease that number. Be aware that
+.I gltext
+is designed to work with a fairly small amount of text, so setting this
+value too high might result in slow performance or strange behaviour
+stemming from buffer overflows. Increase at your own risk.
+.TP 8
+.B \-mono
+Display the text in a monospace font. Default is a variable-width font.
+.TP 8
+.B \-no\-mono
+Display the text in a variable-width font. This is the default.