Multi-Monitor Configuration; Set The Primary Monitor - Acer ADK930 User Manual

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Multi-monitor configuration

Once extra monitors are connected, they can be configured to either
Duplicate mode, Extend mode or set as the primary display.
Position the mouse anywhere on the Windows desktop, right-click and
select Display settings.

Set the primary monitor

Select the preferred monitor and check Make this my main display
to make it your main display.
Note
For some computers, you may need to disable the main display by
unchecking "Extend the desktop onto this monitor" or "Extend my Windows
desktop onto this monitor." (Screenshots may vary slightly with the operating
system.)
Duplicate mode
1. Select Multiple Displays > Duplicate these displays.
2. Click Keep changes to confirm.
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