The closest I could find was right-clicking on the header line of my choice, choosing "Insert" to create a collapsable comment bubble where I can type/paste my text. Unfortunately the comment bubble is too small. If anyone knows if this is possible in Pages, please let me know.
Thanks!
No. Wrong application, as iBooks Author (direct PDF link to Apple) supports HTML widgets embedded in the document, and Pages does not. The iBooks Author application is free from the OS X App Store.
Here is a gallery link with short movies to show the effects in iBooks Author. You can write your own HTML/CSS widgets too. Here is an Apple article, “About HTML widget creation in iBooks Author.”
You are asking for Outlining.
This was removed in Pages 5.x but is available in Pages '09.
Peter
How do I create expand/collapse text in pages?
