a11y

A single letter, usually shown underlined, that jumps straight to a menu or control once the access modifier is held.

Committing an action by keeping a pointer or gaze still on a target for a set time, for input methods that have no click of their own.

Invisible padding that extends a control's activatable area beyond its drawn bounds, so a small icon can stay small and still be easy to hit.

A focus technique where only one item in a group is in the tab order and arrow keys move that position, so Tab enters and leaves the whole group once.

A widget where moving focus also selects, so arrowing through tabs or a listbox changes the selection immediately rather than on a second press.

The area of a control that answers a press, padded out around whatever is drawn so a fingertip can hit it without catching its neighbours.

A shortened form of a word or phrase, from Dr. to NASA, with its own typographic conventions and an expansion assistive tech can speak.

A platform feature that scales interface text to a size the reader chose in system settings, with layouts expected to reflow around it.

A rule drawn under text, on the web the default marker for a link, ideally set to skip the descenders it would otherwise cross.

A perceptual contrast algorithm proposed for WCAG 3 that scores a text and background pair as an Lc value and takes font size and weight into account.

A number from 1:1 to 21:1 describing how far apart two colours sit in relative luminance, used to decide whether text on a background is readable.

An operating system mode that replaces a page's palette with a small user-chosen set of system colours, overriding almost everything an author specified.