How can you make a GUI cover the whole screen
Frame.Size = UDim2.new(1, 0, 1, 0)
if you want to take into account of that pesky topbar:
Frame.Position = UDim2.new(0, 0, 0, -36) Frame.Size = UDim2.new(1, 0, 1, 36)
Frame.Position = UDim2.new(0, 0, 0, -36)
Frame.Size = UDim2.new(1, 0, 1, 36)