AP, the special label 0 is assigned to each voxel in the image. This label is associated with the name 'Clear' and means that a pixel has not been segmented yet.</p>
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 <h3><a name="EditLabel"></a>Step 2. Create a Few Labels</h3>
 <p>When you first load SNAP, it creates a default set of six labels, with names 'Label 1' through 'Label 6'. Before starting segmentation, we will edit these labels, assigning them meaningful names and colors.</p>
 <p>The SNAP control panel contains a sub-panel that is used to