- Provide visualisations of adequate resolution. Low resolution screenshots are not suitable;
- All visualisations include captions and where possible alternative text descriptions;
- The context and educational importance of the content should be clear using only the text or caption;
- Colour is not used in visualisations as the only means of interpreting data;
- Be aware of the consequences of colour choice in visualisations. Consider colour combinations that affect colour blind users, for example red-green combinations;
- Use high contrasting colours for labelling and data;
- The original data on which visualisations are based is available in an accessible format where possible;
- Consider the feasibility of providing tactile images;
- If tactile images are used, carefully consider scale and resolution, and provide adequate labelling that works in all tactile media.
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