Yeah, the undo is a bit strange -- in stock Emacs you have to make a change to the buffer to start undoing in the opposite direction. You can use "undo-only" f

Yeah, the undo is a bit strange -- in stock Emacs you have to make a change to the buffer to start undoing in the opposite direction. You can use "undo-only" for a simpler model, or check out some extensions that modify undo mode: http://www.emacswiki.org/emacs/CategoryUndo http://www.emacswiki.org/emacs/CategoryUndo. The cool thing about Emacs undo is that it can undo in a region. So, say you've made a bunch of changes, and then realized that one of your earlier changes to a particular line were incorrect: just highlight the line and then undo within that.