Support for Timing of multiple animations (sequencing)
The ability to nest animation and interactivity within groups and Multi-State Objects
Six different Page Format options
Text can be rendered as HTML (with embedded fonts or web-safe fallbacks), images (to preserve appearance), or SVG (preserve appearance and scaleability)
Swipe Navigation and touch support
Multimedia & interactivity
3D Flipcard widget (for Pro+ plans)
Video embedding (Flash fallback as well as automatic multi-format fallback for maximum capability)
Audio embedding (with fallbacks and controls)
Embedding of HTML (such as YouTube, Vimeo, or Google Maps)
Supports numourous button actions: Go to Destination, Go to Page, Go to Anchor, Go to Next Page, Go to Previous Page, Go to First page, Go to Next State, Go to Previous State, Go to State, Play, Play from Navigation Point (movies only), Stop, Pause, Stop All
Supports Clicks, Taps, Roll Overs, Roll Offs, and Focus and Blur events
Mobile Article Explorer for easy reading on small screens, while maintaining a pixel-perfect layout.
Support for Alt text using the button name, script label, or Alt text within the Object Export Options
Supports mapping styles to specific HTML tags
Search Engine Optimization (SEO): title, keywords, description, author -- pulls from INDD meta data automatically, and can generate keywords automatically from the document
Ability to export live, editable tables.
HTML and CSS output supports columns, paragraph rules, bullet lists, numbered lists, and anchored images
Supports Table of Contents linking and linking between pages
Output options
Viewer Display options (page thumbnail navigation, reader progress, full screen, zoom in/out, PDF download, etc)
Ability to assign proportional scaling for any device