I'm relatively new to making epubs. I was wondering what features you can incorporate in reflowable layout in InDesign. I know you can include hyperlinks, but it's my understanding that one's limited in terms of animation and images. What else can one include using InDesign?
Reflowable EPUBs are best suited to text heavy documents.
What exactly did you have in mind?
The user can select the type size and select (from a list) the typeface, and also the background color (white, sepia, grey), depending on the viewing device.