It is crucial for every feature to provide a recognizable function. An interface designer should always wonder how a user will know an action is possible.

Preferably, the user interface should be self-explanatory (i.e., easy to understand without any tutorials or support services).

All features should also be discoverable in the interface, without external help.

An interface should keep users informed about their actions and any changes.

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When the interface is self-explanatory, it becomes easy to learn and use.

The interfaces should be easy to understand, learn, and efficient over time.

The ideal humane interface reduces the interface component of a user's work to pure habituation.

A well-designed human interface should not be split into beginner and expert modes. Instead, think of the interface as a beginner-to-expert journey.

The learning phase of working with any professional interface requires conscious attention. Simplicity, clarity of function, and the visibility of a user interface helps beginners learn.

The expert phase is characterized by fast unconscious use.

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An interface is communication.

An interface should be intelligible.

An interface should be habitual. An interface must be reliable.

A design interface should be aesthetically pleasing.

Entropy is the main enemy of an interface designer.

The best interface is no interface.

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