Follow the below steps :
Use any of the following methods to navigate the OSD main menu screen:
a To dismiss the main menu and deactivate the OSD, press ESC, right-click the mouse, or click the X at the upper right-hand corner of the screen.
b To log off the OSD, press F8 or click F8 LOUT at the top of the screen, and answer YES to the prompt.
c To move up or down through the list one line at a time, press the up or down arrow keys, or click the up or down arrow symbols on the right scroll bar of the OSD.
d To move up or down through the list one screen at a time, press the PAGE UP (PGUP) or PAGE DOWN (PGDN) key.
e To activate a port, double-click its name in the list, or highlight the name and press ENTER.
Use any of the following methods to navigate the OSD main menu screen:
a To dismiss the main menu and deactivate the OSD, press ESC, right-click the mouse, or click the X at the upper right-hand corner of the screen.
b To log off the OSD, press F8 or click F8 LOUT at the top of the screen, and answer YES to the prompt.
c To move up or down through the list one line at a time, press the up or down arrow keys, or click the up or down arrow symbols on the right scroll bar of the OSD.
d To move up or down through the list one screen at a time, press the PAGE UP (PGUP) or PAGE DOWN (PGDN) key.
e To activate a port, double-click its name in the list, or highlight the name and press ENTER.