Scott Linden

Thanks but I find nothing in the help nor in this forum addressing this (to me) basic issue: Once two images are "opened," and residing in the upper right-hand corner, how do you put one ON TOP of the other?

I can't seem to put more than one image/layer into the "Layer" box, let alone define one as background and one as top. Am I missing something basic? Can't seem to find this elemental information anywhere. Thanks.