There are 4 tabs in the Sky Sphere settings window.
Here you can choose:
Here you can choose which elements of the sphere to show. For stars, you can set the minimum stellar magnitude from which the stars will be shown.
Here you can set the font sizes of the names of stars, poles of the Sphere and hints. And you can also set the sizes of objects and their names, as well as the sizes of zodiac symbols separately.
Here you can set colors for all the elements of the Sphere. At the same time, the color palette can be saved and read from files.
The Sphere palette files are located in the program folder "sets/SpherePaletteSets".