Siemens Multi Panel MP270 SIMATIC HMI Equipment Manual page 35

Select screen
Screens on the MP270can be viewed, edited and printed. The relevant screen
must have been selected beforehand. There are two ways in which to select a
screen:
Function key
Pressing a function key opens the corresponding screen defined in the
configuration.
Input field
Enter the corresponding number of the screen to be viewed in the input field.
Screen saver
The brightness of the back-lighting for the screen is reduced with increasing
operational use for technological reasons. To increase the service life, the MP270
automatically dims the screen if no key is pressed for a specified period of time.
The back-lighting becomes bright again after pressing any key. The function
assigned to that key is not triggered.
MP270 Equipment Manual
Release 01/99
MP270 Operation
4-13