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The setting on a camera's lens which controls how much light comes into the camera. Aperture settings can usually be set to F-stop values ranging from F1.4-F22. The higher the aperture value, the smaller the opening is, and vice versa, which affects the depth of field in photos and how much light reaches and illuminates a subject or scene in a photo.

The intensity of a color relative to its own brightness. Colours are said to be saturated when they have a strong hue and high intensity.

A system of columns and rows designers use to create layouts. It's used in graphic design and web development to align elements for easy use on the page. Grids are a key part of design because they help you create balance, rhythm, proportion and hierarchy in your layout.

A sequence of user actions on a website. In UX design, it's important to note the order in which users interact with your site so you can redesign it for optimum usability.

The typographic term for the dot above the letters 'i' and 'j'.

A selector that can be applied to any HTML element. ID should be used when designing for a single instance, such as using the id="main" attribute on an <h1> tag.

A type of typographical contrast used to convey emphasis. Italics were initially developed for the printing press and are now widely used in print, web design, public signs and labelling systems.

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.

Also called trim marks, are markings on artwork that tells the printer where to cut the page.

A term that means the smallest amount of work that can be done to move a project forward.