PPI stands for Point Per Inch. PPI is the number of dots per inch in a printer's resolution or the number of pixels per inch in a monitor's screen resolution. The more PPI, the higher your image quality will be as it becomes sharper and clearer. The lower your PPI, the lower your image quality will be, and the more likely you'll see individual pixels in an image.
The principle of both sides of an object having a sense of symmetry. It ensures that the weight and visual mass are distributed evenly on both sides of a surface. Balance is more important than symmetry because people don't often notice when something is asymmetrical, but they will always see if something is unbalanced.
A design technique employed on websites and mobile apps that encourages users to scroll to view additional content.
A sample of the target audience for which a product or service is intended.
The way characters are capitalised within a word or phrase. Common font cases are uppercase, lowercase, capitalised (or title case) and sentence case.
The area of negative space around and between elements in a design.
A layout where all the content, mostly text, is aligned to the centre. The overall purpose of a Centre Alignment is to make it easier for users to read and scroll through content.
The written information that accompanies a design.
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.
The placement or otherwise of a thing in relation to other things. In design, proximity may be considered as the distance between two items in space or their relative location to each other.
Black, white, and all the values of shades in between.