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A prediction model used in human-computer interaction. It states that the time required to move to a target area rapidly increases as the distance to the target increases. The law was proposed by Paul Fitts, an American psychologist, in 1954 as a mathematical model of movement with limited cognitive capacity.

Fitts hypothesized that one would quickly select its first apparent target when reaching for an object before considering alternatives — a phenomenon called "target fixation." This tendency would increase progressively with increased distance between the subject and object until it eventually became exponential (i.e., too far away).

Text that flows from left to right and is the default reading direction of a page with its content aligned on the left margin.

A process in which subjects use a product or service under test conditions and report their experience.

The last line of a paragraph following the rest, or a single line in a paragraph that is out of place with the rest.

The feeling or mood created by a design.

The small decorative stroke at the end of a stroke in a letter, or a typeface.

The thickness or thinness of a typeface. Common font weights are light, regular/normal, semi-bold, bold and extra bold.

An iterative process that designers use to understand the user, challenge assumptions, and redefine the problems to identify alternative strategies and solutions that might not be instantly apparent with our initial level of understanding. Design Thinking provides a solution-based approach to solving problems. It is a way of thinking and working as well as a collection of hands-on methods.

A rule of thumb used in photography to create more visually appealing images which states that an image should be composed so that the subject or focus of the image occupies one-third of the picture space, with two equal vertical lines dividing their composition into two.

A photograph that is purchased and licensed for exclusive use by an individual or business.