I use a $2 generic mouse (looks like a VeeDub beetle) with the out-of-the box driver, cp->mouse->pointer options->snap to is set, I also use the Cursor Hider gadget to auto-hide the pointer when its not needed.
But back on topic - that checkbox is easily missed, IMO it should align with the "Mark newly added books" checkbox, it's a bit like a shag on a rock out there in right field