[B<-w>|B<--width> I<pixels>]
[B<-h>|B<--height> I<pixels>]
[B<-j>|B<--only-graph>]
+[B<-D>|B<--full-size-mode>]
-The width and height of the B<canvas> (the part of the graph with
+By default, the width and height of the B<canvas> (the part with
the actual data and such). This defaults to 400 pixels by 100 pixels.
+If you specify the B<--full-size-mode> option, the width and height
+specify the final dimensions of the output image and the canvas
+is automatically resized to fit.
+
If you specify the B<--only-graph> option and set the height E<lt> 32
pixels you will get a tiny graph image (thumbnail) to use as an icon
for use in an overview, for example. All labeling will be stripped off