Choosing an Opaque or Transparent Background

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When you move or copy a selection from a cursor or icon, any pixels in the selection that match the current background color are, by default, transparent: they do not obscure pixels in the target location. A custom brush behaves in the same way.

To toggle the background-color transparency

• In the Graphics toolbar option selector, click the appropriate button:
  • Opaque background: existing image is obscured by all parts of the selection.
    
    
  • Transparent background: existing image shows through parts of the selection that match the current background color.

You can change the background color while a selection is already in effect to change which parts of the image are transparent.