Screen

[klander6624]

It would be nice if in an update to Xperia 1 II to make it so that you use the screen outdoors as well, it is almost impossible to see anything on it even if it is screwed all the way up on a cloudy day with light clouds

[Come0ne]

Check the brightness of your screen. As I know Xperia 1 II have 540 cd/m².

If is not enough for you to see the screen when you're on max brightness, I dont think that any software can outpass hardware limit. Sorry.

[Gilgameshuk]

There is a way to bypass the max screen brightness and this trick works on the original xperia 1 also.

When outside in bright sunlight........

TURN ADAPTIVE BRIGHTNESS

This actually brightens the screen MORE than the actual brightness slider allows.

[BBEN66]

Yep, Autobrightness helps a lot.