Selections can be helpful when you’re painting or retouching
to correct flaws, add elements, or enhance an image. In Vanishing
Point, making selections let you paint or fill specific areas in
an image while honoring the perspective defined by the planes in
the image. Selections can also be used to clone and move specific image
content in perspective.
Using the Marquee tool in Vanishing Point, you draw a selection
within a perspective plane. If you draw a selection that spans more
than one plane, it wraps to conform to the perspective of each plane.
Once a selection is drawn, you can move it anywhere in the image
and maintain the perspective established by the plane. If your image
has multiple planes, the selection conforms to the perspective of
the plane it’s moved through.
Vanishing Point also lets you clone the image pixels in a selection
as it is moved in an image. In Vanishing Point, a selection containing
image pixels that you can move anywhere in the image is called a
floating
selection. Although not on a separate layer, the pixels in
a floating selection seem to be a separate layer hovering above
the main image. While active, a floating selection can be moved, rotated,
or scaled.
Note: When you paste an item into Vanishing Point, the
pasted pixels are in a floating selection.
Clicking outside a floating selection deselects it. Once deselected,
a floating selection’s content is pasted into the image, replacing
the pixels that were below it. Cloning a copy of a floating selection
also deselects the original.
Vanishing Point has another move option for selections. You can
fill the selection with pixels from the area where the pointer is
moved.

Copying a selection and moving a selection from one perspective
plane to another