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A philosophy that companies should take a user-centred approach to design, making sure they focus on the customer's needs and not on their company's needs. UX designers need to figure out what users want before building something and not after. They must also ask themselves if including "features" will provide any value to the product or service.

Red, green, and blue. These colours can be used to form a wide variety of colours in different devices such as computer monitors and televisions.

An observation in Psychology that suggests that the number of mental objects the average person can keep track of is seven (plus or minus two).

A graphical representation of the density and distribution of data points. Denser regions in the image are interpreted as the data points' frequency, while lower densities are interpreted as fewer data points in that area.

Heatmaps show you where people worldwide are clicking on content to help you understand how people interact with your website designs and content.

An imaginary line on which most letters "sit". As such, it equals the height of an em square. The expected result of a baseline is to reference the height with which text is aligned. The alignment ranges from ascenders, which are the upper strokes in b, d, and h, down to descenders like j or y.

A portion of an image where the remainder is discarded.

A mark or symbol used to represent an institution, organisation, person, or group, and it is usually displayed on flags and seals.

The process of adjusting the spacing between individual letters to improve or avoid particular visual distortions.

The portion of a letter such as y, p, q or j that hangs below the baseline of the text.

All available space (line-height) between two consecutive lines of text; this measurement should be adjusted for either ascenders or descenders. In hand typesetting, leading referred to thin strips of lead inserted by hand between lines of type in the composing stick to increase vertical distance.