--- a/convert.1.txt	Thu May 15 19:00:38 2008 +0200
+++ b/convert.1.txt	Thu May 15 19:58:47 2008 +0200
@@ -2,3 +2,5 @@
   convert a.png -resize 50x50% b.png
   (add a ! after % if you're not interest in aspect ratio.
   (add -filter lanczos before -resize, if you want a lanczos resizer)
+Crop:
+  -crop widthxheight{+-}x{+-}y{%}