Not sure this needs more explanation.
+1, at minimum a single step undo on ctrl/cmd-Z should be required
+1. It looks like one of the most requested features but I don't see it on trello.
+100 basic undo/redo would be fantastic.
+1, this is a must have feature. Along with "duplicate".
This tool is great! But undo/redo would be cuh-razy useful!
Yes this is definetly a needed feature... !!!!
+1 Yes please!
Giving this a +1 as well :)
This is a needed feature. Difficult to use without it
+1 this is such a necessary feature
Has been added to to-do list, thanks for the suggestions!