Feedback and Suggestions (Path of Exile 1) - Undo button for Passive skill tree(not respec) - Forum

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FurryCreature wrote:

It'd be better if there was a "test tree" that would allow you to see your stats but isn't applied. This way you can literally plan your build ingame.

ORRRRR a "Lock-in" button. Make changes to your passive skill tree and have a display of what they would do, but not ACTUALLY apply in combat until you click the "Lock-in" button to permanently apply them!