Press Log on the tool bar, or type Ctrl-T, or use Settings → Log to start logging messages sent to, or received from, a master.

The messages will be traced to either a log file, a log window or both, depending on the configured settings (see Logging: Edit Logging for configuration options). Note that the Log button is not enabled if there are no slaves, or if logging is not configured to log anywhere.

If logging to a window is configured then you need to select View → View Logging or type Ctrl-L to view the logging when it is started. You can clear the trace output at any time by clicking the Clear button in the window.

A fuller description and examples of log entries can be found in the appendix Logging).