the short list of posts apply, lots
POTUS is putting the cabal's murderous days on ICE!
Gimp tips
Make sure you are on the correct layer.
If you are trying to say erase, you're on the correct layer & it won't, you may need to select none by either at the top under select then none or right click, select then none.
Learned these the hard way as I knew nothing about Gimp when I started.