A simple Question

How do I add more than one image onto a single picture?

Like if I was going to make a picture of certain characters from, Final Fantasy, lets just use as an example. If I saved 2 pictures as files, how would I add both onto 1 picture?

1) copy/paste one photo into the other

2) open both files and drag one into the other with the move tool (or hold shift while dragging to make sure your picture is centered)

3) of if you have a picture..where you wanted to add both pictures....either copy/paste both or open each and drag both into the third.