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 area of negative space around and between elements in a design.
The small decorative stroke at the end of a stroke in a letter, or a typeface.
A print that the printer receives to monitor the progress of production. Proofing is a matter of looking at the print to ensure that it has been printed correctly and that the colours are rendered accurately.
Framing consisting of cutting off or obscuring most of the surrounding of a subject, removing distractions from the background and emphasising the subject.
A technique for understanding people’s experience of a product or service. Participants are asked to keep daily records of their experience using the product, and these records are taken into consideration when designing the design.
A PNG (Portable Network Graphics) file is a bitmap image format that has been designed to store images with an alpha channel. This format is primarily used for transparency so that it can be placed over other graphics in many design applications.
The number of visits that result in a purchase or some other goal. It can measure any conversion event, such as download, registration, purchase, etc.
A colour that appears to be pure and lacks any lightness (or tone) or saturation.
The word "bracket" is often used to refer to parentheses and is written as either  or () and used to delimit blocks of text, e.g. a set of instructions. Within brackets, items are arranged from left to right in order of precedence.
A type of user interface design carefully crafted to trick people into doing things they might not want to do.