The Console Log Screen
The Log screen is a read only page available from the Console. At the bottom of the Console page, there is a "View Log" button. Clicking on this button will bring you to the Log screen.
The log contains whatever output the system generates. Normally, the log has some information that is generated on start up, during restarts, and when adding devices to the system. If you choose to write your own device code and insert "print" statements, these will also show up in the log.
If there are errors caught by the running code, these will also show up in the log. If your system behaves strangely, it's a good idea to check the log to see if there is any useful error information in the log.
A typical Log after start up: