I've noticed a couple of skins, such as https://imgur-archive.ppy.sh/discord/466769269510897671-722963744765902968-screenshot007.png that put an overlay on the mode select button to make a custom UI. i'm trying to do something similar, but every time i add the overlay, it just goes down to the bottom offscreen. How exactly do i fix this? is it something in the skin.ini folder that needs to be changed?