Photos don’t always turn out the way we want them. That pole growing out of your head or a spectator’s face popping up right in the wrong place. Or maybe one photo doesn’t tell the whole story like that spectacular sequence of a “Splash” into the water.
Special Events has templates that give you examples of set prices when putting several photos on one image. Photo Editing has a few images showing what can be achieved with editing. Montages has examples of more advanced editing.