M.16 Brightness and Contrast Adjustment Settings GuideDuring run time (while communicating with the device/PLC), you can adjust the screen brightness and contrast for the display unit, and the brightness for the EZ Illuminated Switch, by using the Brightness/Contrast control bar.
M.16 Brightness and Contrast Adjustment Settings Guide
You cannot adjust the brightness/contrast when the display unit is starting up.
The Brightness/Contrast control bar displays the EZ Illuminated Switch settings menu when the EZ Illuminated Switch is connected to the SP5000 series unit.
The GP-4100 Series (Monochrome Model) cannot display the Brightness/Contrast control bar while displaying an error message or system menu.
On the GP-4100 Series (Monochrome Model), when the alarm banner is displayed and the Brightness/Contrast control bar is activated, the alarm banner becomes hidden. The alarm banner re-appears on closing the Brightness/Contrast control bar.
Adjusting the Brightness/Contrast
Touch the top-right then bottom-left corners, or the top-left and bottom-right corners of the panel (within a 40 pixel area) inside 0.5 seconds.
When using WinGP with the SP5000 Series Open Box or IPC Series, touch the top-right then top-left corners, or top-left then top-right corners (40 pixel area) of the panel within 5 seconds.
When using the GP-4100 Series (Monochrome Model), touch the top-right then bottom-left corners, or the top-left and bottom-right corners of the panel (within a 20 pixel area) inside 0.5 seconds.
You can adjust the level of brightness intensity by touching [+] or [-] on the Brightness/Contrast control bar.
You can also adjust the contrast for non-TFT color LCD units. 
By touching the icon indicated, the Contrast control bar appears, where you can adjust the contrast.
Touch [X] on the Brightness/Contrast control bar to end adjustment.
Adjusting the Brightness for the EZ Illuminated Switch
In the project settings, set [Illuminated Switch] to [Enable]. Transfer the project to the display unit.16.6.2 System Settings [Input Equipment] Settings Guide - Illuminated Switch
Connect EZ Illuminated Switch to the display unit.
Touch the top-right then top-left corners, or the top-left then top-right corners, of the display screen to view the Brightness/Contrast control bar.
On the Brightness/Contrast control bar, touch [Display] to change to [Illuminated Switch].
You can adjust the level of brightness intensity by touching [+] or [-] on the Brightness/Contrast control bar.
Touch [X] on the Brightness/Contrast control bar to end adjustment.
Show Brightness/Contrast Control Bar
When the Brightness/Contrast control bar is not on the screen, changes the setting in Offline mode.
For details about the setting screen, refer to the setting guide.M.17.2.3 Main Unit - Display Settings
Go to Offline mode and touch [Main Unit] on the item changeover switch.
Touch [Display Settings].
For the [Show Brightness/Contrast Control Bar], select [Enable].
Touch [Exit] to exit offline mode.
When using GP-4100 Series (Monochrome Model), touch [Top] to return to the initial screen. Touch [Exit] and in the confirmation screen, touch [Save changes and exit].