User Guide

GNU Image Manipulation Program
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14.10.45.2 Example
Figure 14.112: Applying ‘Alpha to Selection’
(a) (b) Non-transparent pixels of the
active layer have replaced the exist-
ing rectangular selection.
14.10.46 Add Alpha channel to Selection
The Add to Selection command creates a selection in the current layer from the Alpha Channel. Opaque pixels are fully selected,
transparent pixels are unselected, and translucent pixels are partially selected. This selection is added to the existing selection.
The alpha channel itself is not changed.
The other commands in this group of operations are similar, except that instead of adding to the existing selection with the
selection produced from the active layer, they either completely replace the selection with a selection produced from the alpha
selection, subtract the alpha selection from the existing selection, or create a selection that is the intersection of the two.
14.10.46.1 Activating the Command
• You can access this command from the image menubar through Layer → Transparency → Add to Selection.
14.10.46.2 Example
Figure 14.113: Applying ‘Add to Selection’
(a) (b) Non-transparent pixels of the
active layer have been added to the
existing selection.
14.10.47 Subtract from Selection
The Subtract from Selection command creates a selection in the current layer from the Alpha Channel. Opaque pixels are fully
selected, transparent pixels are unselected, and translucent pixels are partially selected.This selection is subtracted from the