Using Masks and Layers—Painting, Filling, and Color Tools - GIMP 2.6 for Photographers: Image Editing with Open Source Software - page 276

Figure 3.90
Gardapanorama.
xcf after the tonality
correction and with
guides marking the
overlapping areas of
the layers
Figure 3.91
The entire selection
including the masking
of the layers Garda1
and Garda2. Garda2 is
active.