We may consider it in the future.
Yes, PLEASE add undo support for metadata changes. It has happened to me several times that I use the wrong keyboard shortcut when applying a star rating vs a color class (as the single keys don't work for multiple images). It does indeed take a lot of time trying to manually figure out how to undo it, and sometimes it's just not possible. I have seen it done in other DAM applications.
Philippe KAHN
It happened to me that I accidentaly changed metadata to many files, and it took me a lot of tome the restore them. An "undo" function would be very useful.
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