Siemens SINUMERIK 840D sl Commissioning Manual page 1094

Service and diagnostics
6.5 Remote access
Options for the VNC viewer
Note
Do not change the factory settings!
To ensure that the VNC viewer works properly, the following options may not be changed.
After starting the VNC viewer, the following dialog opens:
Figure 6-4
After clicking the "Options ..." button, the following dialog opens:
Figure 6-5
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VNC Viewer - Factory settings
VNC Viewer > Options - Factory Settings
Commissioning Manual, 03/2013, 6FC5397-1DP40-3BA1
PCU Base Software (IM10)