22STACK menu settings3M™ Digital Projector X56© 3M 2011. All Rights Reserved.3. Press the ◄ button to return to the previous menu, or press the ► button tocomplete the setting. (23)NOTE • If FIXED (COMPUTER IN 1) is selected, either the COMPUTER IN1or IN2 port can be selected as an input source on the Main projector. When theCOMPUTER or VIDEO button on the remote control or the INPUT button onthe projector is pressed, the MAIN INPUT SOURCE dialog will be displayed onscreen. Select COMPUTER IN 1 or COMPUTER IN 2 with the ▲/▼ buttons.• If FIXED (COMPUTER IN 1) is selected, the COMPUTER IN1 port on theSub projector should be connected to the MONITOR OUT port on the Mainprojector with a computer cable. The image from the selected port is outputfrom the MONITOR OUT port on the Main projector to the COMPUTER IN1port on the Sub projector. The MONITOR OUT setting on the Main projector isdisabled when FIXED (COMPUTER IN 1) is selected. (Operator's Guide →SETUP menu)• If FIXED (COMPUTER IN 1) is selected, video signals can be input to theCOMPUTER IN1 or IN2 port on the Main projector. Set the port for videosignal input in the COMPUTER IN menu and set the video format in theVIDEO FORMAT menu. Refer to Inputting image from Main to Sub (28) andInputting image from Main to Sub - Video signal (either component or video).(32)3.5 Selecting input source for Sub1. Highlight SUB INPUT SOURCE in the STACKmenu with the ▲/▼ buttons, then press the ►button to display the SUB INPUT SOURCE dialog.2. Use the ▲/▼ buttons in the dialog to highlight FOLLOW MAIN UNIT or FIXED(COMPUTER IN 1).FOLLOW MAIN UNIT: Sets the input source on the Sub projector to the sameport as Main.FIXED (COMPUTER IN 1): Sets the input source on the Sub projector to theCOMPUTER IN1 port which is connected to the MONITOR OUT port on theMain projector.