31Setting input ports using menu3M™ Digital Projector X56© 3M 2011. All Rights Reserved.5.4 Setting the menuIf Intellectual Stack with RS-232C connection is used, observe the followings.When inputting image signals to Sub via Main, the operations differ between usingcomputer signals and video signals such as component and video signals.Inputting image from Main to Sub - Computer signal1. If the STACK menu is already displayed on the screen, proceed to 3 below.Otherwise press the MENU button on the remote control.If the MENU dialog is displayed, use the ▲/▼ buttons tohighlight MAIN, and press the ► button. A menu will bedisplayed.If the MENU dialog is not displayed, the STACK menu will appear.2. Use the ▲/▼/◄/► buttons to go into the following menu.ADVANCED MENU > OPTION> SERVICE > COMMUNICATION > STACKSTACK menu will appear on screen.(Operator's Guide → OPTION menu)3. Use the ▲/▼ buttons to highlight SUB INPUTSOURCE, and press the ► button to display theSUB INPUT SOURCE dialog.4. Use the ▲/▼ buttons to highlight FIXED (COMPUTER IN 1), and press the ►button to complete the setting. (23)5. Press the COMPUTER or VIDEO button on theremote control or the INPUT button on the controlpanel of the Main projector, the MAIN INPUTSOURCE dialog is displayed on screen. Use the▲/▼ buttons to highlight the port to which the sig-nal cable is connected, and press the ► button tocomplete the setting.NOTE • When FIXED (COMPUTER IN 1) is selected, the MONITOR OUTsetting is invalid. (Operator's Guide → SETUP menu)• When FIXED (COMPUTER IN 1) is selected, input sources other thanCOMPUTER IN1 and COMPUTER IN2 cannot be selected.• When FIXED (COMPUTER IN 1) is selected, if any button for setting theinput ports including COMPUTER, VIDEO, MY SOURCE/DOC.CAMERA andMY BUTTON (assigned with input source related functions) buttons on theremote control and the INPUT button on the projector is pressed, the dialog forselecting the input source will be displayed.