How to control download bandwidth speed limit on netgear jnr1010 router?

I tried QoS setup before only application and device control in priority levels for my PC with mac I assigned low priority level nothing happened in bandwidth download limit same as before but what is the use of low priority level without knowing download bandwidth limit So I want to assain bandwidth limit manually for download speed limit to router or particular devices connected to WiFi router.

A QOS system that only has priorities probably only kicks in when traffic saturates the link. This allows any application, even a low priority one, to use up the entire bandwidth. But if a higher priority application were to arrive while the link is saturated, then bandwidth to the lower priority should be curtailed.

It's analogous to metering lights at the entrance to a toll bridge. When traffic is light, the lights are off. When traffic reaches the capacity of the bridge the lights come on, except that the lights have different priorities. High priority lights cycle faster than low priority lights. You have to assume that traffic is steered to the correct light (e.g. carpools go to the high priority light, 18 wheelers go to the low priority light). If we could control the cycle time of each light, then we could control the traffic rate of each light.

Can anyone explain detailed process of bandwidth control in step by step with images or tutorials.