Maybe I don't get it right, but you need a photoshop or something like that?

Photoshop has its tutorial in it, which helps you to learn easily to use it. You can change parts of the picture by selecting them with a magic tool, which selects the same colouredpart, so like red-eye-effect and so on.

a good example of the use of photoshop:

Best, Bea

The world is full of beauty if the heart is full of love