Some assistive technology, particularly screen-reading software for visually impaired users, cannot see the external appearance of a document, e.g. colours, fonts, print size, layout. Instead, it relies on the internal structure of a document to guide the reader through the text.
SAIF calls this Hidden Accessibility.
Hidden Accessibility can be achieved by following good practice in structuring documents.
This topic is covered fully in SAIF’s elearning module on Hidden Accessibility.