Hi mt194!

Thanks for sharing your thoughts on the features you would like to be added to the scratchpad. We are always working to add features that improve our site, and we love getting input from our community.

I've passed your feedback along to the team and it will be part of our conversation as we plan the future of Khan Academy.

Thanks for helping improve Khan Academy!

This would be an awesome feature! To me it's very instinctual to hit Ctrl + Z to undo something rather than hit a button that does the Undo function.