@Hankpropaniac57: Two possibilities for names right now: The one...

Hankpropaniac57
2023-01-10T15:29:10-05:00

Two possibilities for names right now: The one in the title ("frame_within_frame"), which has the benefit of being descriptive and an actual art term, though is also easily misinterpreted, and "alternate_frame", which is specific enough to describe just this concept, but has the downside of not being particularly illustrative without reading its wiki page for clarification. These two are the best I can come up with at the moment. Ideally it should be illustrative from the name alone and hard to misinterpret, but that seems to be asking for a lot. More possible names would be appreciated! It's difficult to come up with a name for this concept.