Any ideas why this won't work?
PlayerGui.DevProcess.Frame.MOVE.Size = (UDim2.new(0,0,0.868,0))
No errors. Before that, I do this:
PlayerGui.DevProcess.Frame.MOVE:TweenSize(UDim2.new(1, 0,0.868, 0))
and it works absoultely fine, but for the above I don't want to tween it and it just stays the same...
Thanks.

4 comments
You're making the GUI invisible by setting the X to 0.
Yes, that's the idea. I want it to go to 0 to then be able to tween it back up again. The fact is, it stays at 1 - it doesn't go "invisible"
It might not make a difference, but try Size = UDim2.new(0, 0, 0.868, 0)
Tried that and it made no difference :/