How I can cut a photo to make a crossover ?

toi can use a program that will allow toi to déplacer objects at your leisure. Such is the case with Photoshop and the sort.

Here, have a look at this:
link

Here's a "how to" that chesire wrote:
link

A free an simple way is to use GIMP all toi have to do is download it

I don’t know.