For further reading, here are some articles on the subject:
* [https://overlayfactsheet.com/ Overlay Fact Sheet]
* [https://www.a11yproject.com/posts/should-i-use-an-accessibility-overlay/ Should I use an accessibility overlay? | The A11y Project]
* [https://www.siteimprove.com/glossary/accessibility-overlays/#:~:text=Accessibility%20overlay%20tools%20are%20automated,plugin%2C%20app%2C%20or%20widget A guide to accessibility overlays | Site Improve]