Use a font size of at least 12px.

Ensure that there is sufficient contrast between text and background.

Ensure that proper heading styles are used.

Ensure that a logical heading structure is used.

Ensure that images have an alternative description that can convey the full meaning of the image.

Ensure that tables are used for tabular data only.

Ensure that all tables have column headings.

Ensure that all lists use built-in list functionality.

Ensure that all links have text that describes the target.

Ensure that built-in PowerPoint slide templates are used.

Don’t use scanned PDFs.

Ensure that all PDFs are tagged.