Question about Optoma EP721 Projector
You will probably have to press a button combination like FN and one of the F1 to f12 keys, one of them will switch between internal display, external display, both.
you should have picture on the projector, if you don't then right click on your desktop and select properties or adjust resolution.
Then on the properties page find the last tab, which says settings, then you should see something like this.
right click on number 2 and select attach, your background should appear on the projector, you can DRAG windows and files into the projector from the Right side of your screen.
Posted on Oct 04, 2009
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Posted on Jan 02, 2017
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