English to Russian Tech/Engineering Computers: Hardware

Хар-ки компьютера

Users can set the language, watermark and theme in the common interface.
Users can choose *** languages.
Watermark function:
As the phone rotates, the watermark is displayed in the upper left corner of the screen.
Users can choose to turn off the watermark.
Theme settings:
Users can choose to follow the system, day and night themes.

Прошу уточнить перевод фразы "follow the system, day and night themes".

Спасибо.