Page 147 - Photoshop for Lightroom Users – Scott Kelby 2nd Edition

Step Five:
Now open the third image. You’re going to do that whole “select all and copy/paste” routine with this image, so go ahead and Select All and copy this
image into memory. Note: I only used three images for this project, but you can have your subject appear four, five, pretty much as many times as you have
room in your frame. If you want your subject to appear more times, you’ll just either need to move your tripod back farther (so you’re getting a wider
image), or use a wider angle lens, so you can fit more in the same frame. Switch back to the document we’ve been working on and paste this image (it will
appear on its own layer, as well, at the top of the layer stack), and then lower the Opacity to see how this version of her fits with the other two. In this case,
she’s overlapping the center image by quite a bit.

Step Six:
Using the Move tool, drag this layer over to the left until there’s a little space between the version of her on the left and the version in the center on the
Background layer (as shown here). You can then raise the Opacity of this layer back to 100%.