Hello, See my undo/redo commits https://github.com/emilianbold/jmeter/commits/emilianbold-undoredo
The 1st commit [1] fixes #57039 -- it was a matter of sharing internal data and then editing that in the UI. The other commit [2] rewrites part of UndoHistory using the standard javax.swing.undo classes and also introduces the concept of an 'undo transaction'. This is needed to group multiple changes like the node changes after "Search for a node by name". The are probably many other places that need some beginUndoTransaction/endUndoTransaction pairs, I've only added a few. Also, we probably need a way to temporarily disable UndoHistory, for example during loading. I haven't tested this, so please confirm if loading large files has a big impact with undo enabled. Some low hanging fruit exists for compound edits where we could merge/swallow edits. 1. https://github.com/emilianbold/jmeter/commit/ea9859995d1fb53905b720bc57a1ddf283b29ce8 2. https://github.com/emilianbold/jmeter/commit/401221e9f6e480e43fcf51ee99458a0d7fdd661d --emi
