How ConceptD 7 Ezel remaps the pen keys？

Yliong

Hello, I am an artist. Newly purchased Acer’s ConcepD 7 Ezel,
I have three questions about this pen:
1. I want to know how I can remap the two buttons on its pen. For example, change one to the middle mouse button and one to the eraser e.
2. Does this pen have no setup program? I think Microsoft, Samsung, Lenovo, and HP have dedicated pen setting programs. If not, I strongly recommend developing one! This is really needed! Thanks a lot.
3. Is it possible for this pen to be of a common normal size? Now the two buttons on this pen are quite inconvenient to press. Or can he use other brands of pens with the same passive emr technology? For example, the pen of Samsung galaxy tab s series tablet.

Thanks, hope to answer