You can see messages between the local computer and the server appear in the Log. You can also see a log for each individual session in the Individual Log Pane, just above the Queue & Log Pane, and just below the Remote Pane.
Make certain there is a check mark on the View menu next to Individual Session Logs.
To add or remove a check mark, click View > Individual Session Logs.
Or
Remove the check mark from the View menu to hide the individual session log.
Displaying connection logs in the bottom pane