To Change the Display of Transparent Colors

1. On the ribbon, click Raster Tools tab Edit panel Process Image drop-down menu Palette Manager.

   The Palette Manager dialog box is displayed.

2. Click View menuShow Transparent. Or with no colors selected in the color table, right-click and click Show Transparent on the shortcut menu. A check mark means that transparent colors will be displayed with a “+” indicator.
   Note: If no transparent color has been assigned, the Show Transparent menu item will be grayed.