UI design (or interface design) refers to the overall design of the human-computer interaction, operation logic, and the interface of the software, which is also called interface design. UI design is divided into physical UI and virtual UI. The UI design said by the Internet is virtual UI, and UI is short for User Interface.
Good UI design is not only to make the software personality and taste, but also to make the operation of the software comfortable, simple and free, fully reflecting the positioning and characteristics of the software.

Design Principles
1. Simplicity
The concise interface is to make the user easy to use, easy to understand the product, and reduce the possibility of wrong choices.
2. User language
The interface should use the language that reflects the user, not the language of the game designer.
3. Minimize memory burden
The human brain is not a computer, and the limits of the human brain's ability to process information must be considered when designing interfaces. Human short-term memory is limited and extremely unstable, with a forgetting rate of about 25% in 24 hours. So for users, browsing information is easier than remembering.
4. Consistency
It is a characteristic of each excellent interface. The structure of the interface must be clear and consistent, and the style must be consistent with the product content.
5. Clear
Easy to understand and use in visual effects.
6. User familiarity
Users can use the interface through the knowledge they have mastered, but it should not exceed common sense.
7. Consider from user habits
Think what the user thinks and do what the user does. Users always understand and use their own methods.
By comparing things in two different worlds (real and virtual), a better design is completed. Such as: books compare bamboo slips.
8. Arrange
An orderly interface allows users to easily use.
9. Security
Users are free to make choices, and all choices are reversible. When the user makes a dangerous choice, there is a prompt of information intervention system.
10. Flexibility
In short, it is to make it convenient for users to use, but it is different from the above. That is, the interactive multiplicity is not limited to a single tool (including mouse, keyboard or handle, interface).
11. Humanity
High efficiency and user satisfaction are the embodiment of humanity. It should have expert-level and junior player systems, that is, users can customize the interface according to their own habits and save the settings.