Cell Display Screen

The display screen on my cell phone used to be very bright, and it dims automatically in a power saving mode when it is idle. A few weeks ago, coinciding when the basketball season started, I noticed that the screen was very dim.  I noticed this when I was in the United Supermarkets Arena,  home of the Texas Tech basketball teams and the women's volleyball team.  It did not really bother me anywhere else, and I thought it might have something to do with the lighting in the arena.  But I just was not satisfied with that explanation.  Yesterday while I was in the arena, waiting for the men's basketball game to begin, I started looking for a different answer.  And found it in settings, under Display and Brightness.  The brightness setting was set to its very lowest.  I think this occurred during the last update.  That is one of the things that distresses me about updates, they change settings that I never thought about, and have to go looking to try to change it to the way I like it.