Techniques

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 (i.e., bank check). 

Make it easier for people to complete input fields requesting personal information.

Use responsive design to allow your content to zoom and respond to various screen sizes.

The contrast of icons and graphical objects is just as important as that of text. Use sufficient contrast for all elements on the screen, with a minimum contrast ratio of 3:1.

People with a variety of print disabilities (including low vision, dyslexia, other cognitive disabilities) can benefit from being able to increase the spacing between lines, words, and/or letters on their own device.

Make it easier for users to interact with added content. Tooltips, drop-down menus, and popups are examples of added content.

If keyboard shortcuts are implemented using only a letter (including upper- and lower-case letters), punctuation, number, or symbol characters, provide a way to turn off or remap character key shortcuts.

All operations must use simple gestures that need only a single touch. If the site or application does use multi-touch gestures, be sure to also provide simple interfaces. 

People with disabilities rely on interface controls that are used programmatically. These controls have a visual label, as well as a programmatic label, known as its Accessible Name.

Ensure that functions that are triggered by moving a device or by gesturing towards the device can also be operated by more conventional user interface components.

Assistive technology users should be able to detect when important changes occur on a web page, With the use of a status message, information can be provided to the user without changing focus or unnecessarily interrupting their work.

Placement of controls affects their ease of use.