The Intersect with Selection command creates a selection in the image from the pixels of the active layer according to their transparency. Opaque areas are fully selected, transparent areas are unselected, and translucent areas are partially selected. This selection is intersected with an existing selection: only common parts of both selections are kept. The alpha channel itself is not changed.

10.47.2.  Example

Figure 10.115.  Applying “Intersect with Selection”

Non-transparent pixels of the active layer have been intersected with the existing rectangular selection.