Well, now that you new that it is there, you could just type :help undo-tree. Basically, it is about g+/g-.
And the next chapter of undo.txt tells you about saving undo history.
Well, now that you new that it is there, you could just type :help undo-tree. Basically, it is about g+/g-.
And the next chapter of undo.txt tells you about saving undo history.