Grokking the GIMP is a leading book for learning advanced digital image editing techniques using the GNU Image Manipulation Program, the GIMP. The book provides everything needed to learn the GIMP, including tutorials, beginning and advanced techniques, and practical information.

This section discusses techniques for editing channel and layer masks. Although, layer masks are used to edit a layer's alpha channel, and channel masks are used to store and edit selections, these two mask types behave similarly. Thus, the techniques for editing and filtering them can be treated in a somewhat unified manner.