Currently, click-hold and dragging with the middle mouse button results (hand symbol with four arrows) in the document scrolling at a (rather extreme) rate of speed that is determined how far away your cursor is from where you first clicked the button. The document will scroll continuously until you either move your cursor back closer to its initial location, or release the mouse button.
I would much prefer the behavior to be like what you get when you hold space and then click and drag with the left mouse button. I.e., you "drag" the document around with the mouse, and the document only moves as much as you "drag" it.

Please implement this behavior !
Thank you.