Extra 
 
1.  Press  (Menu) to display menu. 
2.  Press< or >to select    (Extra), and press to enter. 
3.  Press< or >to select submenu, and press to enter. 
4.  Press< or >to adjust. 
5.  Press to exit. 
Select Input Signal Source 
Auto adjust the picture to default   
Full,Square,1:1,17”(4:3), 19” 
(4:3), 19”(16:10), 21.5”
(16:9), 22”(16:10), 23”(16:9) 
Select image ratio for display.   
Turn ON/OFF DDC-CI Support 
Reset the menu to default 
Show the information of the main image and 
sub-image source