Touch scroll with Chromium?

Hi all!

I was wondering, I am trying to use an Adafruit 5" HDMI screen with a Pi2 (being used as an interface to a Home Assistant install), is there a way to make Chromium (using autostart) to allow scrolling of a window like a phone/tablet rather than a mouse system? I saw in /chromium-autostart.sh there is a “tablet mode” but that didn’t seem to do anything - although I am probably miss-understanding what that actually does!