The Create Page is where you can save your SurfaceAppearnce.
Select your SurfaceAppearance you want to add, then click the button “IMPORT”, then type out what you want to name your saved SurfaceAppearance, and then click the button “CREATE”.
yeah I tried to do that but unfortunately roblox doesn’t let you access surfaceappearance properties in scripts. If they ever do I will add that feature.