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GNU Image Manipulation Program
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existing selection. The Alpha channel itself is not changed.
14.10.47.1
Activating the Command
• You can access this command from the image menubar through Layer → Transparency → Subtract from Selection
• or from the pop-up menu which appears when you right-click on the active layer in the Layer Dialog.
14.10.47.2
Example
Figure 14.114: Applying ‘Subtract from Selection’
(a)
(b) Non-transparent pixels of the
active layer have been subtracted
from the existing rectangular selec-
tion.
active layer have been subtracted
from the existing rectangular selec-
tion.
14.10.48
Intersect Alpha channel with Selection
The Intersect with 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 intersected with the
existing selection: only common parts of both selections are kept. The alpha channel itself is not changed.
selected, transparent pixels are unselected, and translucent pixels are partially selected. This selection is intersected with the
existing selection: only common parts of both selections are kept. The alpha channel itself is not changed.
14.10.48.1
Activating the Command
• You can access this command from the image menubar through Layer → Transparency → Intersect with Selection
• or from the pop-up menu which appears when you right-click on the active layer in the Layers Dialog.