> option slows <B>pnmcrop</B> down, as it reads the
entire image to determine the background color in addition to the up
to three times that it would read it without <B>-sides</B>.

<DT><B>-left</B>

<DD>Remove any left border.

<DT><B>-right</B>

<DD>Remove any right border.

<DT><B>-top</B>

<DD>Remove any top border.

<DT><B>-bottom</B>

<DD>Remove any bottom border.

<DT><B>-verbose</B>

<DD>Print on Standard Error information about the processing,
including exactly how much is being cropped off of whic