Canon XEED WUX450 - Manual (Page 264)

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Using Layout Functions
■ Switching Projectors Used for the Layout
On the layout window, you can set up the projection layout.
To choose a different projector for the layout, select it from the projector pull-down
list.
■ Controlling all Projectors at Once
To set up the projection layout for all projectors at once, select [ALL] in the projector
pull-down menu.