How to cancel last action in GUI Editor

I have a quick noob question regarding the GUI Editor. I am only starting to further investigate how to build UI with the editor and right now, I am wondering how you cancel the last action?
Ctrl+Z or Z does not seem to do anything…

ping @PatrickRyan @carolhmj

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Unfortunately we don’t have undo/redo support yet :frowning: We have plans to standardize our tools which involves adding this support, but it’s going to take a bit to start working on that.