Wacom Intuos Pro L User Manual page 7

Eraser
Select the Eraser tab to adjust eraser sensitivity.

Use the Eraser Feel slider to customize the amount of pressure needed to erase.

From the Erase dropdown menu, select the function to perform when using the eraser.

Click Customize to further adjust the eraser sensitivity.

With your screen cursor positioned over an empty area of the control panel, press down
on the Current Pressure bar with the eraser to determine pressure levels.