[Izkata]

That's an option on the Move tool, whether to move the current layer or the thing you clicked on.

As someone who has never used Photoshop, I've always found Gimp to be pretty intuitive, and reading some of the complaints on here I expect I'd find Photoshop strange and unintuitive. For example, one of the comparisons above is about copy/paste, but from their description the Gimp version is much closer to how copy/paste works in general, where you have to paste to create the new copy before you can manipulate it.