How to modify shortcut for Brush Size? I can't find it in the Customize Keys menu. Corel 2020

Hello friends. I would really thank you if you can help me.

1. How to modify shortcut for Brush Size? I can't find it in the Customize Keys menu. Corel 2020

2. How to rotate canvas from touch ring wheel in drawing tablet? (Huion HS610)

Thank you very much