this post was submitted on 19 Oct 2023
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Emacs is king of undo. Theres a number of ways but you can bsck up the undo chain a step or steps at a time. Ie if you’ve done 20 changes you can just keep going back with a keystroke.
There is also undo-tree package so you can visually see what state your buffer has been in over time and then just go pick the state you want.
Do note that undo-tree not only provides a visual, it is a fundamentally different way of doing undos. The stock emacs way is not a tree, it's a line. There's no real "redo" in emacs for instance, you just undo an undo. It's odd, but undo tree works really well.