olumns
and rows.</p>

<p>To make a selection, select a dataset from the tree and choose the
&ldquo;Open As&rdquo; command from the Context menu. The selection
dialog box appears. You can make a selection by dragging the mouse on the preview
image or entering the values of start, end, and stride. The figure below shows that
a subset of size 66 x 159 is selected from a true color image with the size of 179 x 359.</p>

<center><p>
<img src="images/datasetsubsetimage.png" />
<br /><b>The Dataset Selection dialo