Siemens SIMATIC PANEL PC 877 - Manual (Page 82)

Operation and configuration
9.2 Additional Drivers and Applications
SIMATIC Panel PC 877
9-14
Operating instructions, Release 07/2006, A5E00877780-01
9.2.7 Setbrightness
Start
"Set brightness" symbol on the desktop.
Function
The intensity of the backlighting is adjusted using "Set brightness."
Figure 9-4 Setbrightness