User manual
USER GUIDE 4243/4209L 
SW200174 Rev A, Page 12 of 23 
The buttons and their functionality are: 
Button 
Function when OSD is not displayed: 
Function when OSD is displayed: 
Menu 
Display OSD main menu 
Return to previous OSD menu 
Display OSD Brightness submenu 
Increase value of selected parameter / 
select previous menu item 
Display OSD Contrast submenu 
Decrease value of selected parameter / 
select next menu item 
Select 
Input Select 
Select parameter for adjustment / 
select submenu to enter 
Using the OSD buttons controls an on-screen graphical user interface which displays on top of 
your input video, allowing intuitive adjustment of the following display parameters: 
Parameter 
Available Adjustment 
Brightness 
Increase/decrease monitor brightness. 
Default: maximum 
Contrast 
Increase/decrease monitor contrast. 
Default: best gray-shade performance 
Clock 
Allows fine adjustments of the panel’s pixel dot clock. 
Only applicable for VGA input video 
Phase 
Allows fine adjustments of the panel’s pixel dot clock phase. 
Only applicable for VGA input video 
Auto Adjust 
Automatically adjusts the system clock to the input analog VGA video signal, affecting 
the H-position, V-position, Clock, and Phase menu items. 
Only applicable for VGA input video 
H-position 
Moves the image horizontally on the display in single-pixel increments. 
Default: centered. 
Only applicable for VGA input video 
V-position 
Moves the image vertically on the display in single-pixel increments. 
Default: centered. 
Only applicable for VGA input video 
Aspect Ratio 
Switches the scaling method between Full Scaling and Maintain Aspect Ratio. 
Default: Full Scaling 
Full Scaling – scales the X- and Y-dimensions of the input video (up or down as 
needed) to the display’s native resolution. 
Fill To Aspect Ratio – Assuming a landscape orientation and an input video with aspect 
ratio smaller than 1920 x 1080, scales the Y-dimension of the input video (up or down 
as needed) to the display’s Y-resolution, and scales the X-dimension to maintain the 
input video’s aspect ratio (and fills the rest of the display with equal black bars on the 
left and right). 
The touchscreen may need recalibration when switching between Aspect Ratio 
options. 
Sharpness 
Adjusts sharpness of the displayed images. 
Default: no sharpness adjustment 
Only applicable at non-native input video resolutions 










