On the Windows Desktop version, the log window can be opened via the OPEN LOG WINDOW button found in the Performance section or via the Composer menu "Analysis/Open log window..."
The log window contains the application log entries and data on date/time, log level, and a message.
Log levels can be filtered using the checkboxes at the top of the window.

Top copy a log entry, right-click on the row, and choose copy.

The log window only shows the recent log entries. The entire log file can be found in the Logs folder located in the application root directory.

The ESC key will close the Log Window.