Elitegroup G900 User Manual - Manual (Page 51)

The Boot Menu
The Boot menu allows the user to specify the order in which the
Notebook is to check for a device to boot the system. You can also
configure the way that the system will boot up. To make changes, select
Boot from the menu bar.
The following screen appears:
Use the up and down arrows to select the boot device. Then press either
the plus key [+] to move the device up the list or the minus key [-] to
move the device down the list.
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