I've always found it really annoying that the wardrobe doesn't have something like this already-- just a little 'reset' button that wipes all markings, decor, background etc. of the lion you're customizing so that you don't have to manually reset everything if you want to make another design. It would be really helpful if you need to design an heir and are making multiple different designs or are just mucking around in the wardrobe trying to make pretty lions.