4.4 Special Display Features4-164 DPT FeaturesWith the display telephone, KX-T7230, KX-T7235, KX-T7431, KX-T7433 or KX-T7436, you can easily access several features.The display telephones have the ability to perform the following features.FeatureCall Forwarding / Do Not DisturbCall Log, IncomingCall Log Lock, IncomingCall Log, OutgoingCall DirectoryExtension DialingStation Speed DialingSystem Speed DialingSystem Feature Access MenuKX-T723044KX-T723544444444KX-T74314444KX-T7433444444KX-T743644444444“4” indicates the features is available.Helpful Information about Display OperationPress CONT (S1) to adjust the display contrast.Press RING (S2) to adjust the ringer volume.Press BGM (S3) to turn on/off the BGM.Press MENU (S1) to return to the initial display.Press PREV (S2) to return to the previous display.Press NEXT (S3) to advance to the next display.Press ACCNT (S3) to enter an account code.