The Firefox window places important functions such as the scrollbar, titlebar functions (minimize, maximize, close), and tab navigation at the edge of the interface, where they require less precision to use.
Barrier pointing (or "edge pointing") is a term used in human–computer interaction to describe a design technique in which targets are placed on the peripheral borders of touchscreen interfaces to aid in motor control.[1] Where targets are placed alongside raised edges on mobile devices, the user has a physical barrier to aid navigation, useful for situational impairments such as walking;[2] similarly, screen edges that stop the cursor mean that targets placed along screen edges require less precise movements to select.[1] This allows the most common or important functions to be placed on the edge of a user interface, while other functions that may require more precision can utilise the interface's 'open space'.
Barrier pointing is also a term used in accessible design, as a design technique that makes targets easier to press. For example, barrier pointing using raised edges on touchscreens, alongside a stylus and a 'lift-off' or 'take-off' selection mode, can improve usability for a user with cerebral palsy.[2]
One example of assistive technology focused on barrier pointing is the SUPPLE system, which redesigns the size, shape, and arrangement of interfaces based on its measurement of motor articulation input.[3][4]
^ abAppert, Chapuis, Beaudouin-Lafon (2008). "Evaluation of pointing performance on screen edges". Proceedings of the working conference on Advanced visual interfaces. pp. 119–126. doi:10.1145/1385569.1385590. ISBN 9781605581415. S2CID 11655191.{{cite book}}: CS1 maint: multiple names: authors list (link)
^ abWobbrock, Kane, Jacob O., Shaun (210). "Ability-Based Design: Concept, Principles and Examples" (PDF). ACM.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^Gajos, Weld, Wobbrock, K.Z., D.S., J.O. (2010). "Automatically generating personalized user interfaces with SUPPLE". Artificial Intelligence. 174 (12–13): 910–950. doi:10.1016/j.artint.2010.05.005.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^Wobbrock, Gajos. "A comparison of area pointing and goal crossing for people with and without motor impairments". Proceedings of the ACM SIGACCESS Conference on Computers and Accessibility (ASSETS '07) (New York: ACM Press): 3–10.
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