Use pen to drag slider bar is there a set up where I can use my pen to drag a slider such as brush radius?

When I click on the slider I have to enter values and I would prefer to use the pen to slide the value. I know I can use f but would like to make use of the slider. thank you
If you use your pen with a fast click on a slider you can enter a value, but if you put (with the pen) your cursor on the slider and slide, the slider acts as .... a slider! (At least, this is what happens with my Wacom Intuos on 2.8 in sculpt mode).