Size Box makes little sense inside a Canvas Slot - setting Desired Size is the slot’s job here. Could you remove the Size Box and punch in the size for the Border directly instead:
RMB the Size Box → Replace with Child should work.
Size Box makes little sense inside a Canvas Slot - setting Desired Size is the slot’s job here. Could you remove the Size Box and punch in the size for the Border directly instead:
RMB the Size Box → Replace with Child should work.