7.43. Subtract Alpha from Selection

The Subtract Alpha from Selection command creates a selection from the combined alpha channels of all selected layers and subtracts that from the already existing selection.

Opaque areas are fully selected, transparent areas are unselected, and translucent areas are partially selected. The alpha channels of the selected layers are not changed.

7.43.1. Activating the Command

You can access this command

  • From the main menu through LayerTransparencySubtract Alpha from Selection.

7.43.2. Příklad

Obrázek 16.107. Applying Subtract Alpha from Selection

Applying „Subtract Alpha from Selection“
Applying „Subtract Alpha from Selection“

Non-transparent pixels of the active layer have been subtracted from the existing rectangular selection.