You do realize that the tools in Photoshop are just digital replications of the tools and processes that have existed in art studios for many years. Slice, erase, burn, sponge, smudge, et cetera.
Do you actually have any
evidence that the moon landings were faked? I've seen a fair but of wild speculation and on other non flat earth sites which also claim this was faked (but don't believe in a flat earth) I've seen a load of spurious things like "how come you can't see the stars in the photos" (exposure levels) and "why aren't the shadows all the same angle" (the landscape wasn't completely flat) and "why is the flag waving" (it isn't, there was a rod along the top so it didn't just hang limp, it just flaps when they screw it into the surface).
These are all spurious objections from people who, frankly, don't know much about the moon landings.
If you want to learn more about the Apollo programme then I can recommend "Man On The Moon" by Andrew Chaikin.
Read that and then come back and tell me that the level of detail in that book could have been realistically faked.