Why is screen so Dim?

Unchecking the "show me things when Idle" won't turn off screen dimming. There should be an option for 'Never' in the Screen dimming settings, but I don't see why you wouldn't want it to be active. It helps prevent your TV's pixels from burning out for displaying
the same light over long periods of time. It's simple enough to just move a stick on your controller to get the screen dimming to go away every hour so I've never really had much issue with it.

I've just checked on my console and it dims for me too, but I never noticed it before!

Now that I look at it, I can see why it's done. On those particular tabs, there is plain white text in certain spots, so the background dims to make that more readable, while with the main home screen and the "pins" tab, it's all tiles so the dimming isn't
required.

There's no way to turn it off, but it's obviously by design. I'm surprised I didn't notice it before you mentioned it though, haha!

I mean when the screen dims when it goes into idle. When i watch a movie or tv the screen dims

If you are in the preview program... hold down the XB button on the screen that is dimmed.. select give feedback... screen shot and send it...

As for why?? sounds like it is your custom backgrounds... try using another one

Why would i want it dimmed while im using it is the real question? If i had it on a menu or home screen for an extended time sure dimming it is a great idea. While im trying to watch a program, any program longer than an hour, im supposed to turn on the
controller and "move a stick on my controller" EVERY HOUR? Thats dumb! Netflix has a "are you still watching?" And the screen will dim, how bout xbox tail on with the idea? There is no never option.