desktop-restore-frames

desktop-restore-frames is a variable defined in `desktop.el'.
Its value is

t

Documentation:
When non-nil, save and restore the frame and window configuration.
See related options `desktop-restore-reuses-frames',
`desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.4 of Emacs.