4.15.6 Controlling proxy logging
Often the proxy interaction has its own diagnostic output; this is particularly the case for local proxy commands.
The setting ‘Print proxy diagnostics in the terminal window’ lets you control how much of the proxy's diagnostics are printed to the main terminal window, along with output from your main session.
By default (‘No’), proxy diagnostics are only sent to the Event Log; with ‘Yes’ they are also printed to the terminal, where they may get mixed up with your main session. ‘Only until session starts’ is a compromise; proxy messages will go to the terminal window until the main session is deemed to have started (in a protocol-dependent way), which is when they're most likely to be interesting; any further proxy-related messages during the session will only go to the Event Log.