you don't actually need to hit the boxes, you just need to point into the direction. So, right click, drag, release. That's enough to trigger one of the option

you don't actually need to hit the boxes, you just need to point into the direction. So, right click, drag, release. That's enough to trigger one of the options. Over- or undershooting are not an issue. You also don't need to wait for sub-menus to appear, so if you know there's a menu going north, south, north. Then you can just drag your mouse up, down, up in one motion and it will detect the direction changes.