Please try the following steps.
1. Open Bosto Driver and click on buttons.
![How to customize your pen display/Pen Tablet keys How to customize your pen display/Pen Tablet keys](https://0.rc.xiniu.com/g1/M00/4A/64/CgAGS2CszZiAFtRaAADUOxVbQmw354.png)
2.Set to the shortcut functions you need.
![How to customize your pen display/Pen Tablet keys How to customize your pen display/Pen Tablet keys](https://0.rc.xiniu.com/g1/M00/4A/64/CgAGS2CszhKAXXOzAADbtP0eH2Y055.png)
![How to customize your pen display/Pen Tablet keys How to customize your pen display/Pen Tablet keys](https://0.rc.xiniu.com/g1/M00/4A/64/CgAGS2CszleALNl4AADVVs8-d-Q066.png)
![How to customize your pen display/Pen Tablet keys How to customize your pen display/Pen Tablet keys](https://0.rc.xiniu.com/g1/M00/4A/64/CgAGS2CszqiAKF5eAADGKf5b96o765.png)
3.You can also set to a combintaion function on the keyboard area.
![How to customize your pen display/Pen Tablet keys How to customize your pen display/Pen Tablet keys](https://0.rc.xiniu.com/g1/M00/4A/65/CgAGS2CszxWAM0ZUAADC4PdBvE0262.png)
Please kindly note that the wheel's function is fixed, and cannot be customized.