Epson EasyMP Network Projection Operation Manual page 28

Using Multi-Screen Display
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In a Windows environment, if the virtual display driver has been
q
enabled such that the mouse pointer can be moved outside the limits
of the screen, there may be occasions when you lose track of the
location of the pointer. If you are not using a virtual display, clear the
virtual display checkbox on the Add-Remove Virtual Display screen so
that the mouse pointer moves back inside the screen's display area. To
subsequently use multi-display again, place a check mark against the
required display under Add-Remove Virtual Display.
To clear a check mark, see the following. s p.22