I need to make a GUI that will take up the size of the user's screen - no less and no more. How can I do this?
The best way is to just put a screengui in StarterGui with a frame inside and increade the frames size both ways until when you enter a game, the gui fills up the screen, just guess and check.
Every person's screen is different.
So i recommend, Size: {2.5,0}(2.5,0}