The Reveal tool allows you to paint the contents of one or more source front images directly onto the result. You can also use the Reveal tool to copy source matte images onto the output matte. For example, if one source has a tree that you would like to include on the canvas, you can select the source with the tree and then paint it onto the result.
To paint with a copy of the result or output matte image, use the Clone tool. See Clone.
To reveal a source:
Useful Paint settings:
To limit the revealed sources to the areas delimited by their mattes, select Matte On in the Source Matte box.
You can reveal sources that are marked as hidden in the Sources list. You will only be able to view the strokes created with a source when you disable Hide Strokes.
To display the source as an overlay of the result image, enable Overlay (Tab). See Previewing a Reveal or Clone Using a Reference Image.