Specify which visual to use. Legal values are the name of a visual class,
or the id number (decimal or hex) of a specific visual.
.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.
+Display the current frame rate, CPU load, and polygon count.
.SH ENVIRONMENT
.PP
.TP 8