Among the many tools and resources the e-textbooks have to offer, the highlighting function is a great way to save key phrases for easy review later. By simply click and dragging over the desired text, the highlight tool is able to highlight everything in the book with the exception of images. I'm not sure why you would want to turn our images into junky sepia polaroids anyways. :/
Those who experienced the old Library platform that had limited use of highlight (only basic text) will be delighted to see this update in the new Edify platform.
If you are trying to highlight text after logging out and back in and it is still not working, it may be that the browser or computer is not up-to-date on the processing power.
If issues with the highlight feature persist, please reach out to email@example.com who will address your concerns in a timely manner.