Overall history

This is indeed functionality we plan once we have a formalized format for graphical expositions (together with the possibility to see what changed between versions, or even "playback" the creation of an exposition). Meanwhile it is possible on a more limited scale to make and restore manual snapshots: https://guide.researchcatalogue.net/#manage-versions

Be aware though, that when a snapshot is restored it is always a new exposition with a new url, which may be relevant if the exposition is already public.