ay
between them.  You can specify that the background is white or black
with the <B>-white</B> and <B>-black</B> options or make
<B>pnmcrop</B> base its guess on all four corners instead of just two
with <B>-sides</B>.

<P>By default, <B>pnmcrop</B> chops off any stripe of background color
it finds, on all four sides.  You can tell <B>pnmcrop</B> to remove
only specific borders with the <B>-left</B>, <B>-right</B>,
<B>-top</B>, and <B>-bottom</B> options.

<P>If you want to chop a specific amount off the si