means centered, and <b>right</b>
means flush right.

<p>The <b>-xoff</b> option modifies this position.

<b>beyondleft</b> means just out of frame to the left -- the right edge of
the overlay is flush with the left edge of the underlying image.  
<b>beyondright</b> means just out of frame to the right.  These alignments
are useful only if you add a <b>-xoff</b> option.    These two values were
added in Netpbm 10.10 (October 2002).

<p>The default is <b>left</b>.

<DT><B>-valign=</b><i>alignment</i>
<DD>

Th