Choose Paint Edit > Deform Layer . The active image layer
will display manipulator handles as shown below.
Current settings of this tool:
Pick and move the right top corner handle
using the . (Action = Unconstrained
corner deformation)
Select and move the center right handle
with the to make the image wider.
(Action = Unconstrained edge deformation)
Select and move the left top corner handle
with the . (Action = Unconstrained
corner deformation)
Select and move the right corner handle
with the to make the image wider
following the 2 point perspective guide lines. (Action = Constrained
corner deformation)
By using the vertical & horizontal
bias controls in the option window you can deform the center of
the image, that is, pull or push the center of the image towards
or away from the perspective point.