Often I will rearrange my grid to test various layouts, only to find the first was the best. At the moment I manage this by taking a screenshot of my grid to refer back to incase I don’t like the changes I’ve made. It would be good to have an ‘undo’ button which allows users to reverse the changes made to their layout.

Hi! We think you’ll love our ‘Clone’ Feature, you can use this to create many different ‘versions’ of your Space. It’s great to test out different layouts, photo/video posts, captions, etc.
https://unumdesign.zendesk.com/hc/en-us/articles/360057872452-How-to-use-UNUM-Design-for-Desktop

@Dillon unfortunately the Clone feature stops working once you have more than 500 photos/videos in your space

Would be good to have an edit history of a space and the ability to revert to a particular point.
Recently I installed Unum on Android (normally I work from iPhone) and after loading my space in Android it completely messed up the layout. Things got randomly moved around without me touching anything.