What are the functions of the Scroller and Group Keys on Huion Inspiroy 2?

Huion Inspiroy 2 S/M/L pen tablet is the first tablet in the industry to be equipped with a practical Scroller. And Inspiroy 2 M/L comes with eight programmable press keys and three Group Keys.

1. Scroller: Scroll the wheel to execute the function you set. (Without a driver installed, the Scroller's default functions are zoom in/zoom out)
2. Group Key: Each Group Key is in charge of a specific set of shortcuts. When an indicator is on, it indicates that the corresponding group of shortcuts is enabled.