Siemens SIMATIC S7-1500 System Manual page 180

CPU display
Tooltips
Some of the values shown on the display (e.g., station name, plant designation, location
identifier, PROFINET device name, etc.) can exceed the available display width. This applies
in particular to the display of the CPU 1511-1 PN or CPU 1513-1 PN. A tooltip appears when
you focus on the respective value on the display and then press the "Left" arrow key. The
tooltip shows the name of the value in complete length. The tooltip is hidden again if you
again press the "Left" arrow or the ESC key.
Figure 12-4
180
Tooltip function
Automation system
System Manual, 12/2014, A5E03461182-AC