Anything in minecraft can be screen shot. The title screen, server list, text, chests, anything, as long as your screenshot button works.
At the moment i am having trouble Screenshoting chests the simple F2 So i have just been taking screenshots with my macbook [Command shift 3] If that helps
For chests (bc I have a mac) I do 'command' + 'shift' + '4' and then drag it over the area you want to take a photo of. It doesn't work if you are not in a a chest or an item with a GUI