To change SDDM settings with autologin use the :guilabel:`Autologin` tab. To have sddm log back in after a session exists check the :guilabel:`Whether sddm should automatically log back into sessions when they exit`. To change which session to automatically log into use the :guilabel:`Name of session file for autologin session` drop down. To choose which user to login use the :guilabel:`Username for autologin session` field.
