With Photoshop's layering feature, you can composite separate images together for a number of purposes. For example, you can add your company's logo as a watermark on top of a product photo, or you ...

Photoshop can flip, rotate and transform your images. For example, if you open a headshot in Photoshop you can flip it so that the profile faces the opposite direction. The image may then fit better ...

One of the most exciting projects you can tackle in image editing software that supports layering—Adobe Photoshop, Photoshop Elements, Pixelmator, etc.—is to combine images in interesting ways.