Editing Touchscreen (section)

==="Gorilla arm"===
{{see also|Repetitive strain injury|Tennis elbow}}
Extended use of gestural interfaces without the ability of the user to rest their arm is referred to as "gorilla arm".<ref>{{cite web|url=http://catb.org/jargon/html/G/gorilla-arm.html|title=gorilla arm|publisher=Catb.org|access-date=2012-01-04|url-status=live|archive-url=https://web.archive.org/web/20120121023718/http://www.catb.org/jargon/html/G/gorilla-arm.html|archive-date=2012-01-21}}</ref> It can result in fatigue, and even repetitive stress injury when routinely used in a work setting. Certain early pen-based interfaces required the operator to work in this position for much of the workday.<ref>{{cite web|url=http://gesturedesignblog.com/?page_id=19|title=Gesture Fatigue ruined light pens forever. Make sure it doesn't ruin your gesture design|publisher=Gesture Design Blog|access-date=2014-08-23|archive-url=https://web.archive.org/web/20150213011323/http://gesturedesignblog.com/?page_id=19|archive-date=2015-02-13|url-status=dead}}</ref> Allowing the user to rest their hand or arm on the input device or a frame around it is a solution for this in many contexts. This phenomenon is often cited as an example of movements to be minimized by proper ergonomic design.

Unsupported touchscreens are still fairly common in applications such as [[Automated teller machine|ATMs]] and data kiosks, but are not an issue as the typical user only engages for brief and widely spaced periods.<ref>{{cite journal|author=Pogue, David |date=January 3, 2013|title=Why Touch Screens Will Not Take Over|journal=[[Scientific American]]|volume=308|issue=1|page=25|doi=10.1038/scientificamerican0113-25|pmid=23342443}}</ref>