If you select the Frontier compute engine's Active Display option (see The Options Dialog Box), the the Frontier compute engine window will run like a screen saver, appearing automatically when your computer is idle or working on tasks. You'll be able to tell the Frontier compute engine is working when:
Parabon Computation's logo, 
,
in the top right-hand corner of the window is animated.
The monitor of the "working"
engine indicator, 
,
in the lower right-hand corner of the window blinks.
If you clear the Active Display
check box, the Frontier compute engine will appear only as an icon in your system tray,
check box, the Frontier compute engine will appear only as an icon in your system tray,
changing appearance to indicate the engine's status. You'll know
The Frontier compute engine is working when the "working" icon, 
,
appears.