All OLC is saved automatically on exit with the exception of buildwalk, dig, and room/mob/obj delete. These are left unsaved in case a new builder inadvertently buildwalks, digs, or deletes where they did not want to. Unsaved OLC is lost after a shutdown reboot. But, it is autosaved with a copyover or shutdown die. All other forms of OLC are saved by quitting and saying "yes" to save internally. See also:: OLC, BUILDWALK, DIG, ROOMDELETE