1. Open Tablet Properties
2. Change one of the buttons to ‘erase’
Now when you are in brush mode and you hold down that button on your stylus, your brush will temporarily turn into an eraser! Just release it to return to brush mode and keep painting.
The temporary eraser will have the same settings as the last eraser you used
BONUS TIP: To do this without changing your preferences, just press and HOLD the “e” key to erase temporarily. Keep holding the “e” key until you are done erasing, then when you lift your stylus and then release the “e” key your tool will switch back to the brush tool!
I know you can flip the stylus over and erase, but why interrupt your flow when you can just press on a button?