Clearly marking the structure of InDesign documents by adding Section Labels to the top of the page on a non-exporting layer. 

Using the Section Labels and Page Markers tools in the CircularFLO Accessibility Tools Panel, labels are added to the top of the InDesign page. On exporting to EPUB these labels are used to define structure and help with navigation.

The background colour of a label denotes whether it is frontmatter, bodymatter or endmatter and used to structure and make landmarks in CircularFLO exported EPUBs.

Section markers can also be used to auto generate contents for the CircularFLO Table of Contents panel with the Add Section markers to TOC tool in the CircularFLO Document Tools.

CircularFLO will also automatically add page markers in the page content and write a page list into the exported EPUB.