Homepage: https://www.gnu.org/software/emacs
Author: Ivar Rummelhoff
Restore old window configurations
Winner mode is a global minor mode that records the changes in the window configuration (i.e. how the frames are partitioned into windows) so that the changes can be "undone" using the command `winner-undo'. By default this one is bound to the key sequence ctrl-c left. If you change your mind (while undoing), you can press ctrl-c right (calling `winner-redo').