Where user controls are provided for volume adjustment, ICT shall provide user controls for the selection of captions at the same menu level as the user controls for volume or program selection.


Information and communication technology (ICT) controls related to captions are just as important and useful as controls for play, pause and volume functions. It should be easy and obvious to find and access all associated caption controls.

Note: Several “Time-based Media” Success Criteria in WCAG 2.0, such as 1.2.2 Captions (Prerecorded), require that captions are provided. Those stipulate that when creating content, the author must ensure audio content has been transcribed and is captured in a format that can be used to provide synchronized captions. Those requirements, covering the content of the captions, are complementary to 503.4.1, which covers the controls for turning captions on and off provided by the media player.

Development Techniques

Note: Review the General techniques as well as other tabs applicable to your technology.  Prioritize the use of technology-specific techniques, and implement the General techniques as needed. You are always required to find, understand and implement accessible code techniques to meet the checkpoint. The documented techniques and supplements are not exhaustive; they illustrate acceptable ways to achieve the spirit of the checkpoint. If numbered, techniques are in order of preference, with recommended techniques listed first.

General techniques

Each item in this section represents a technique or combination of techniques deemed sufficient for meeting this checkpoint.

For compliance reporting, where the requirements of 7.3 User Controls for Captions and Audio Description are met, 503.4.1 can also be considered to be met.

Mobile Native (iOS) techniques

There are no specific Mobile Native iOS techniques for this checkpoint. Refer to the General techniques section.

Eclipse techniques

There are no specific Eclipse techniques for this checkpoint. Refer to the General techniques section.

Windows-based (MSAA+IA2) techniques

There are no specific Windows-based (MSAA+IA2) techniques for this checkpoint. Refer to the General techniques section.

Many links in this checklist reside outside ibm.com at the Web Content Accessibility Guidelines (WCAG) 2.1. W3C Recommendation 05 June 2018: http://www.w3.org/TR/WCAG21/

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