G image from one or more input FITS images, included a number
  of overlay modes.  mViewer has its own set of documentation.<a href="/mViewer/">here</a>.</dd>
</dl>


<p><b>Grid Tools:</b> [source code in the <span class="dir">grid</span> subdirectory]</p>
<p class="note">These modules should be considered prototypes: they have been used extensively but have not been subject to the same rigorous testing to which the core modules have been subjected.  We advise users to contact Montage (<a href="mailto:monta