To access the System Monitor window, tap on an empty part of a screen. This must be at least 2 columns wide and 2 rows high. Tap System and then System Monitor.
This will open the System Monitor window.
System monitor window
This is a debug screen. It displays the inner working of the desk.
There is not much to see for the common user in this window. If the desk does not behave right, this might provide some hint to trouble shooting.