How do you highlight text on a Dell laptop

I've recently migrated from my Macbook Pro / OSX environment to a Dell XPS 15 (9530) on Windows 10 Home. I'm finding the touch-pad operation finicky. Whenever I use the scroll gesture on my touch-pad, I occasionally find myself highlighting chunks of text by accident. I haven't been able to replicate this consistently. Does anyone know what is it I'm doing to cause this?

Thanks,

Sam

Newbie mistake. It turns out it had nothing to do with the the scrolling gesture at all. I think what I was accidentally doing was performing a highlight gesture using a touch-pad. Tapping twice then dragging the cursor over the will cause Windows 10 to highlight text.