Adaptive and Responsive Output

Topic	Technique	WCAG AA Requirement
Device Orientation	Horizontal or Vertical Orientation: Content does not restrict its view and operation to a single display orientation, such as portrait or landscape, unless a specific display orientation is essential	Required WCAG 1.3.4 (WCAG 2.1)
Adaptive/ Responsive Text	See the requirements for Text Styles, Resize, Reflow, and Zoom	Required Multiple
Other Adaptive/ Responsive Elements	Content that would cause scrolling in two directions (both horizontally and vertically) MUST respond to the viewport size or zoom state by resizing and/or reflowing, at viewport resolutions of up to 320px for vertically-scrolling content, and 256px for horizontally-scrolling content. Images Forms Tables Objects and Plugins UI Components Video	Required WCAG 1.4.10 (WCAG 2.1)
Simplification	Simplified Content: Features of the content MAY be simplified, reduced in size, or eliminated when magnified or when viewed on small viewports.	best practice
Simplified User Interface: Features of the interface SHOULD be simplified, reduced in size, or eliminated when magnified or when viewed on small viewports.	best practice