A window configuration stores information about the positions, sizes, and contents of the windows in a frame, so you can recreate the same arrangement of windows later.
Window configurations do not have a read syntax. They print in hash notation, giving a unique number assigned at the time the window configuration was created.
(current-window-configuration)
⇒ #<window-configuration 0x2db4>
See Window Configurations, for a description of several functions related to window configurations.