1.
dress-up, changing outfits
Changing the clothes on a doll or character. Also used for changing the visual theme or appearance of a device, app, or interface.
From the verb 着せ替える (to change clothes on someone/something). Refers to changing outfits on dolls, characters, or digital interfaces.
Common collocations
Digital usage
Originally from doll play, the term has expanded to digital contexts: changing phone themes, app skins, and avatar outfits in games. スマホの着せ替え (smartphone customization) is a common usage.