Obviously the very best is 4K UHD - but remember you'll need to have the Ultra HD enabled box for the very best quality.
Obviously, your TV needs to support the quality you select - if you choose one that's not supported it will automatically revert back to the original setting after 10 seconds.
There are five different picture quality levels you can get on Sky Q.
1080i is Full HD but "might appear to flicker or blur during action scenes or live sport" Sky warns.
You can change the picture quality on Sky Q by following the steps below.
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