62 guidance statements support this functional need:
- 2D alternative to 3D - For systems that provide three dimensional content, people may need three dimensional visual information presented using only two dimensions.
- Adaptable captions - As a person who uses captions or subtitles to access spoken content, and who also has moderate visual impairment, I need to be able to customize the presentation of captions and subtitles so I can read them effectively.
- Appropriate brightness - For systems that present visual content, people may need to change the brightness based on the viewing environment and situation.
- Appropriate safety level - People may need the system to provide an appropriate level of safety (including physical safety, and safety of my data, finances, legally, etc.).
- Appropriate speed - For systems that present dynamic images, people may need adjust the presentation speed to enable them to perceive and track them.
- Assistive technology-compatible - For systems with user interfaces, people may need content and operable elements to be accessed and presented through assistive technology.
- Audio control - For systems that present auditory content, people must be able to control the content ' s auditory content volume independently from the overall system volume level.
- Avoid contrast changes - For systems that present content, people may need to avoid changes to the foreground color that reduce the contrast with the background color.
- Avoid glare - For stationary or installed systems, people may need to avoid reflective and environmental glare.
- Avoid interruptions - For systems that include notifications, advertisements, browser pop-ups, or other interruptions to task completion, people may need to avoid the unnecessary interruptions.
- Avoid overwhelming visuals - For systems with visual content, people may need to avoid visual events that may overload their perception.
- Avoid visual distractions - For systems with visual output, people may need to avoid visual distractions that may prevent them from focusing on a task.
- Background noise - For systems that present content, people may need to be able to distinguish information in the foreground from background noise (noise which may be of any modality).
- Changing content alternatives - For systems that provide changes in content (including state, role or value), people may need visual, auditory, and tactile indications of the change.
- Changing content programmatic - For systems that provide changes in content (including state, role or value), people may need programmatic indcations of the change.
- Clean accessible name - Relates to interactive equivalent
- Consistent layout - For systems that present content, people may need consistent layouts and hierarchies using familiar conventions.
- Consistent visual design - For systems with visual content, people may need content that uses consistent and familiar visual conventions.
- Control timeout - For systems that time out, people may need to be able to adjust, extend or turn off any time out.
- Default fonts - For systems that present text, people may need text to be written using a font and style that supports readability (example: avoids all caps, italics, and very light weights).
- Distinguish if actionable - For systems that include static and interactive components, people may need interactive components to be clearly distinguishable visually and programmatically from static content.
- Equivalent privacy control - For systems that collect private information, people with disabilities may need the system to maintain my privacy and provide them the same amount of control of their personal information/privacy as other users.
- Error identification - For systems with possible errors, people may need errors to be identified sensorily and programmatically.
- Error prevention - For systems with possible errors, people may need submissions to be checked, confirmable or reversible
- Familiar interactions - People may need content and interfaces that follow familiar user interface interaction behavior and feedback conventions.
- Hover content - For systems that present hover content, people may need hover content to be dismissible, hoverable, and persistent.
- Input modality choice - For systems that accept input, people may need to be able to choose modalities to be used for inputs to the system.
- Large scale layout - For systems with large scale display modes, people may need the visual relationship aspects of the layout to be preserved, and content not to be clipped.
- Limited vision distinguish distractions - For systems that present content that is not related to a task or from a different source than the main content, people may need the secondary content to be clearly indicated programmatically, visually with high luminosity, or with equivalent auditory and tactile versions.
- Magnification - For systems that present visual content, people may need to magnify or resize content.
- Meaningful focus order - For systems with interactive components, people may need those components to be available in a meaningful sequence that facilitates operation.
- Meaningful sequence - For systems that present content, people may need the content to be available in a meaningful sequence both sensorily and programmatically.
- Multiple Paths - People may need multiple paths through content with unnecessary distractions and interactions.
- Mute all audio - For systems with audio output, people may need the ability to silence or mute all audio output.
- Name, role, value, state - Overlap with programmatic structure and relationships.
- No disruption when activating access feature - People may need to be able to activate their desired modality without a serious disruption such as restarting the computer, closing and restarting an app, or leaving an active task in progress.
- No reliance on specific sense to avoid injury - For system the presents content and other stimuli, people may need alternative versions of content that do not rely on a specific sense to avoid injury.
- No-color equivalents - For systems that use color to indicate meaning, people may need information provided through chromaticity to be available in another visual manner.
- Nontext contrast - For systems that present visual interface components and graphical objects, people may need these to have sufficient contrast with adjacent colors.
- Nonvisual instruction references - For systems that provide instructions, people may need instructions that reference visual information to include an additional programmatic reference or provide equivalent auditory or tactile references.
- Obvious, avoidable hazards - For systems that include hazards, people may need the hazards to be obvious, easy to avoid, and difficult to trigger.
- Output modality choice - As a user with limited or no vision or with limited or no hearing, I need to be able to choose modalities to be used for outputs from the system.
- Privacy protection - For systems that collect private information, people with disabilities may need the system to protect their privacy, even when they are not doing things that other users might be expected to do to guard their own privacy.
- Programmatic structure and relationships - For systems that present content, people may need structure and relationships (title, labels, section headings) presented sensorily and programmatically.
- Recognizable signals - For systems that provide alerts, people may need recognizable signals (including feedback and cues) for different alerts or other messages that use signals.
- Recognize human - For systems that use biometrics, people may need human-detection tools that recognize that people who do not look like everyone else are human and are present with equal reliability, for purpose of obstacle avoidance, non-bot verification, etc. This includes tools operated by other people.
- Recognize individual - For systems that use biometric verification tools such as facial appearance, iris pattern, or finger presence, people with atypical biometric factors may need ways to verify their identity with equal reliability to other people.
- Safe without reliance on alerts - For systems that present alerts, people may need to use the system safely even if I miss an alert or hazard warning.
- Scrolling - For systems that present enough content to go outside the viewport, people may need scrolling limited to a single direction.
- Select audio stream - For a system with multiple audio streams, people may need to select and deselect different audio streams.
- Separate output control - For systems with assistive technology built into the platform or that work with assistive technology, people may need to be able to control output of assistive technology separate from output of content.
- Signposts - People may need clear signposts to indicate specific locations where functionalities can be found.
- Status indicators - For systems with toggle controls that have states, people may need the state of the system available to them.
- Text alignment - For systems with text, I need text not to be set to full justify.
- Text contrast - For systems that present text, people may need text to have sufficient contrast with its background.
- Timing - People may need no time limit on systems OR for systems that time out, people may need to continue their task without data loss when they log back in after time out occurs.
- Title - For systems with pages or page-like groups of content, people may need the page or screen to have a visual and programmatic title that describes the purpose of the page.
- Unchanging button functionality - For systems that require physical operation, people may need each button or key to have its own functionality rather than functionality that changes depending on context.
- Unexpected change of context - For systems with interactive components, people may need to be able to input content without unexpected changes in context.
- Unexpected change of focus - For systems with interactive components, people may need to focus on an element without unexpected changes in context.
- Updating content - For systems with automatically updating content, people may need to be able to control it.
- Visual presentation control - For systems that present text, people may need to be able to control the visual presentation of the content including color, orientation, formatting, spacing, justification, and size.