Gallery - No option to set theme
It is not possible to choose the theme to use with the Gallery app. At present, the theme follows the system theme. However, for apps like a photo gallery, many people would prefer to always use a dark theme, or better yet, to be able to choose the color of background.
Proposal:
Add a settings option to the Gallery app and then allow the use to choose (1) system theme, (2) Dark, (3) Light, or (4) Custom.