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

Greyscale / Grayscale

Black, white, and all the values of shades in between.

User Scenario

An example of a typical user and the actions they take. Typically these are written in the form of a story.

Abstract Mark

An abstract mark is a type of logo where instead of being a recognizable object from everyday life, it is an abstract geometric form representing a business or brand. Famous examples include the BP starburst logo, and the Pepsi divided circle.

Hue

A colour that appears to be pure and lacks any lightness (or tone) or saturation.

Design Debt

A concept used in systems design to describe the negative consequences of making seemingly innocuous design changes. Shorthand for a product's delayed but inevitable need to be reworked due to earlier, seemingly trivial decisions not having been fully thought through in the original release.

Designers incur this "debt" by making quick and easy choices that save time in the present but cause more complex problems later on down the road when it becomes necessary to change or add something.

Bottom Navigation

One of the most common types of navigation in UI design. It's usually a system of one or more horizontal buttons placed at the bottom of the screen, directing users to other parts of an app or website. Bottom navigation is often used as an alternative to scrolling or tabbing through links on a page.

Readability

A measure of the ease of understanding text.

TIFF File

A Tagged Image File Format is a file format for storing images losslessly.

Thumbnail Sketch

A quick and rough sketch of what you are about to work on. Good for getting the ideas out of your head and onto the page while you're still in that creative phase.

Monochrome

Designs that are created in one colour. It can be any colour, but the whole design will range from light to darker shades. As the name implies, it is typically a single hue, with black and white also being typical combinations for this type of design.

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