Eurocom X8 - Manual (Page 316)

NVIDIA Video Driver Controls
C - 8 Configuring an External Display (NVIDIA)
C
6. The Primary display (the main window display) will be denoted by an asterisk
*
in
the top right corner of the icon.
7. To change the Primary display right-click the icon and select Make primary.
8. Click Apply > Yes to save any changes.
Right-click and select Make primary
Select Apply > Yes
to save changes
Figure C - 6
Switch Primary
Display