+.TP 8
+.B \-duration \fIseconds\fP
+How long to run before loading a new image. Default 120 seconds.
+.TP 8
+.B \-mode \fImode\fP
+The direction in which the image should tend to slide. Legal values are
+\fIrandom\fP (meaning pick one), \fIup\fP, \fIleft\fP, \fIright\fP,
+\fIdown\fP, \fIupleft\fP, \fIdownleft\fP, \fIupright\fP, \fIdownright\fP,
+\fIshuffle\fP (meaning prefer no particular direction), \fIin\fP (meaning
+move things toward the center), \fIout\fP (meaning move things away
+from the center), \fImelt\fP (meaning melt straight
+downward), \fIstretch\fP (meaning stretch the screen downward),
+and \fIfuzz\fP (meaning go blurry instead of melty).
+.TP 8
+.B \-fps
+Display the current frame rate and CPU load.