I accidentally pressed a button on my keyboard (idk which it was) and all my dockers disappeared, when I went to re-add them, the Layer and Overview dockers (in the Settings > Dockers > ) were greyed out and I couldn't click them, I don't always use the overview docker but, I do need it, as for the layer... it's pretty important, how do I get them back?

could you try resetting the workspace by selecting 'default' from the workspace switcher? (It's the rightmost button on the top-toolbar)

Yes, thank you that worked.