Epson PowerLite 1715c - Manual (Page 86)

86 Presenting Through a Wireless Network
3. Click Use multi-display , then click Display properties .
4. On the Display Properties screen in Windows, make sure your
Epson Projector Virtual Display Driver is selected, then check
Extend my Windows desktop onto this monitor and click
OK .
In the Mac OS X Displays program, select the Arrangement tab
and uncheck the Mirror Displays setting to deselect it.