Answers
How you move around in a UI
The style of text in a UI, with types like Serif and Sans Serif
Making a UI usable for people with disabilities
Often described as being part of a palette Too many can cause issues for those with accessibility needs
Plain text without flicks, good for screens and people with dyslexia
Text with little flicks at the ends, good for reading on paper
The room between items in a UI, important for making it easy to read and use
How simple a UI is to navigate and use
Strong colour difference between text and its background, making it easy to read
Making everything look and work the same in a UI