These two videos (18 and 19) show you how to add an 'email link', i.e. a link that allows someone to send you an email, 'page transitions', so that you can choose a variety of transitions to go from one page to another in your PDF, and Bookmarks – a really easy way to create an interactive Table of Contents for your document that appears in a sidebar in Adobe Acrobat rather than on one of your document pages.