About the theme slider
The theme slider toggles the look of the entire UI (User Interface) to either have a white background with black text (day / light mode) or a black background with grey text (dark / night mode).
2.2 Theme slider
The theme slider toggles the look of the entire UI (User Interface) to either have a white background with black text (day / light mode) or a black background with grey text (dark / night mode).