Creating and Deleting Windows

Horizontal and vertical drags of the Smart Mouse Keys are used to split and delete Emacs windows.

An Action Mouse Key horizontal drag of five or more characters in either direction within a single window creates a new window by splitting the current window into two windows, one atop the other. An Action Mouse Key vertical drag in either direction splits the current window into two side-by-side windows. A horizontal or vertical drag of the Assist Mouse Key within a single window, deletes that window.

If you split windows many times and then delete a number of the windows, you’ll be left with windows of differing heights. Use {C-x +} to re-balance the sizes of the remaining windows, so they are fairly even.