Would never have occurred to me to try that, and I didn’t see any help suggesting it. I’ve never seen anything use right-click drag before. I had tried left-click drag, scrolling, zooming, arrow keys, and moving into the edge, all of which I’ve seen before.
It's awkward to use right click drag on my laptop with a touchpad. Usually games use the two finger drag on the touchpad (which is the same as the vertical and horizontal scroll wheel on a mouse). Is it possible to add that as an option?
Would really appreciate other methods as well as right-click drag on browser games doesn't consistently work in my browser so I can hardly move the screen at all. I've also seen other games let you scroll the upgrades screen with the keyboard (WASD).
