I would check out the website of Elizabeth Castro. She has created several eBooks on creating EPUBs:
Also check out her blog:
Quite likely, this cannot be exported directly from InDesign but will have to be done by editing the CSS after you've exported the EPUB so I hope you're good at HTML/CSS.
Thank you for answering me, yes, ultimately I know I can probably get this done by editing the html/css. I just wonder if I do end up editing the html/css, is there a way to open the epub back up in InDesign after I do the editing, if I wanted to continue updating the file through InDesign. Or is this not possible, because it would rewrite over the html/css? Basically, if I edited the html/css I would have to continue editing everything through html/css and not with any help of InDesign anymore?
Just trying to understand this before I choose which way I am going to try executing this.
Going to CSS is obviously a one-way route. However, if you create your own CSS file, then you could edit the InDesign file, and use your new CSS file to create the revised EPUB file.