Baseline

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.

More terms you might want to know

Vector

A graphic element that has a definite length and direction. Examples of vectors would be straight lines, edges, or curves.

Pagination

A technique used to sequentially present items in a list or other data set that are too long to display at one time.

Colour Palette

A specific set of colours, usually with a limited number of values, chosen to suit the needs of a particular design.

Rule of Thirds

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.

Web Page Elements

A textual or graphical component in a web page.

GIF

A file format that supports both static and animated images. It is a popular file format on the internet and social media due to its wide colour support, portability, and animating capabilities.

Bowl

In typography, a bowl is a curved shape used to control the area of white space.

Fitts' Law

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).

Analogous Colours

Colours that have a relation in their hue. A colour wheel can be used to help identify analogous colours. Analogous colours are typically found next to each other on the colour wheel.

Margin

The space that an item has around it.

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