i want a photo editor software to take a photo and pick a part of that photo by layers and segments and cover that part by another photo
would you please help me ?!!
Photoshop is the most well know software out there, also on of the best.
In terms of free software there is also GIMP, wich is very simple to use but more limited than photoshop, you should definilty try it out, you just download it at their ofcial site and try it.
You can also get a 30 day trial on photoshop CS5 /CS6