Adobe InDesign - Manual (Page 10)

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Also, Hyperlink and Cross- References panel are now separated.
Additional enhancements
The Delete All button is replaced with Delete Unused.
The Delete Unused Destination deletes the destinations that were added earlier but are not in use currently.
More on Simplified Hyperlinks (video)
EPUB enhancements
Enhanced in InDesign CC
Many significant improvements and enhancements have been made to the EPUB capability of InDesign. (To see the list of all changes, refer to
InDesign_EPUB_Changes_CC_9.0_to_9.2.pdf .)
Create reflowable interactive books
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