Tab navigation:

The intent of this Success Criterion is to ensure that when users navigate sequentially through content, they encounter information in an order that is consistent with the meaning of the content and can be operated from the keyboard. This reduces confusion by letting users form a consistent mental model of the content. There may be different orders that reflect logical relationships in the content. For example, moving through components in a table one row at a time or one column at a time both reflect the logical relationships in the content. Either order may satisfy this Success Criterion.

Skip links:

Having a consistent set of navigation links at the top or left side of a Web page is beneficial both for general usability and for people with certain mobility impairments, as they may not need to move the mouse as far to reach the navigation.

For users with screen readers, however, hearing the same list of links at the beginning of each page is time consuming and potentially irritating. Therefore a skip navigation strategy should be included to allow users of screen readers to skip over a block of navigational links.

ARIA roles:

As part of the Web Accessibility Initiative (WAI), the Accessible Rich Internet Applications Suite (ARIA), defines a way to make Web content and Web applications more accessible. It is used to improve the accessibility of dynamic content and advanced user interface controls developed with Ajax, HTML, JavaScript, and related technologies. ARIA roles work now in many browsers and screen readers.

High contrast

High contrast settings benefit users with low vision or other visual disabilities.

Font size

There are icons for changing font size on page. This can be used to allow visitors to increase or decrease the size of text on your page. This can be useful for visitors who have trouble reading smaller text and allows them to increase it to something they can view more easily.