173M™ Digital Projector X56© 3M 2011. All Rights Reserved.3.1 Displaying STACK menuUse the ▲/▼/◄/► buttons to go into the following menu.ADVANCED MENU > OPTION> SERVICE > COMMUNICATION > STACKSTACK menu will appear on screen.(Operator's Guide → OPTION menu) Thesetting for Intellectual Stack operation starts from this menu.Set the Intellectual Stack operation using the STACK menu.NOTE • If you are using Simple Stack without RS-232C connection, skip thischapter.• If you do not need to change the settings made during the installationexplained prior to this chapter, go to 3.3 Selecting lamp operation mode. (19)• Read 3.7 Important information for Intellectual Stack carefully. (24)NOTE • Check that the following settings are made on both projectors.Otherwise, STACK menu on the projectors cannot be operated. (7)- STANDBY MODE in SETUP menu: NORMAL(Operator's Guide → SETUP menu)- COMMUNICATION TYPE under COMMUNICATION in SERVICE menu: OFF(Operator's Guide → OPTION menu)- STACK LOCK in SECURITY menu: OFF (7)3. STACK menu settings