Acer PD126D series - Manual (Page 28)

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User Controls
Management
(Computer / Video
Mode)
Startup Screen
Use this function to select your desired start-up screen. If you change
the setting from one to another, when you exit the OSD menu, the
new setting will take effect immediately.
Acer: The default start-up screen of Acer projector.
User: The user customized start-up screen, which is downloaded
from PC to projector via the USB cable and Acer eOpening Management
utility (refer to the description of below section).
Acer eOpening Management