I'm unsure of how I would do this. Is there a way to make a GUI take up the entirety of the screen regardless of the user's device?
Most ui instances have 4 numbers when it comes to their size. Size.X.Scale, Size.X.Offset, Size.Y.Scale, Size.Y.Offset.
Scale is a number from 0 to 1 relative to the size of the screen.
So if you want a frame to take up the entire screen you could change both scale numbers to 1
What it looks like in studio: {1,0},{1,0} What it looks like in script: UDim2.new(1,0,1,0)
Position also has the same concept.
So when you go to size instead of using {0, this number},{0, and this number} use {1, 0},{1, 0} and it will fill the to the size of the parent