By default, in5 will export all pages in your InDesign document into a single HTML file. But there are a couple of reasons why you might want an HTML file generated for each page in the InDesign document:
- Each page will have it’s own URL (so you can easily link to a page)
- Loading only one page at time decreases load time in the browser, especially for long documents
The ability to export a document as multiple HTML files actually already exists within in5, though we haven’t done a great job of advertising it.
Both the Baker Framework (HPUB) and the Liquid State Publishing System Output options will export one HTML file per page.
Both outputs can be used directly on the web, though the Liquid State Publishing System option will probably be slightly better because the index.html file redirects to the first page (whereas in Baker the index file contains the page thumbnails).
One thing that is lost when switching to a multi-file format is the animated transition between pages. If you want to keep that transition, but also be able to link to individual pages, check out this solution on the Answer Exchange.