30 guidance statements support this object characteristic:
- Appropriate brightness - For systems that present visual content, people may need to change the brightness based on the viewing environment and situation.
- 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.
- Auditory equivalents - For systems with auditory content, people may need that content presented programmatically or need equivalent visual and tactile versions.
- 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.
- Clean accessible name - Relates to interactive equivalent
- Clear control behavior - For systems that include interactive components, people may need to understand what a control does, how it relates to other content, and how to use it.
- Consistent identification - For systems that include interactive components, people may need interactive components with the same functionality to be labeled the same.
- 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.
- Emotional coping - For systems with triggering content, people may need to to have assistance in coping with my emotional reactions to using the system.
- Findable - People may need to easily locate interactive components and important content.
- Flexible input format - For systems with inputs, people may need inputs to accept different formats.
- Harmful visual content - For systems that provide visual content, people may need to identify flashing, motion, and other visual effects that can harm them and avoid it.
- Language of content - For systems that present language based content, people may need the language of content to be programmatically determinable.
- Magnification - For systems that present visual content, people may need to magnify or resize content.
- Multiple simultaneous modalities - For systems that present information, people may need the information presented simultaneously in multiple preferred modalities (visual and audio; tactile and audio; visual and tactile; or visual, audio, and tactile).
- Name, role, value, state - Overlap with programmatic structure and relationships.
- 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.
- Olfactory equivalents - For systems with olfactory or gustatory content, people may need that content presented programmatically or need equivalent visual, auditory, and tactile versions.
- 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.
- Scrolling - For systems that present enough content to go outside the viewport, people may need scrolling limited to a single direction.
- 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.
- 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.
- Text spacing - For systems that present text, people may need white space between segments of text.
- 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.
- Visual equivalents - For systems with media content, people may need audio descriptions or a text transcript available.
- 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.