...CS 2 and CS3 Button behaviors are the smae and as follows:
Close
Closes the PDF document.
Exit
Exits the application, such as Adobe Reader, in which the PDF document is open.
Go To Anchor
Jumps to the specified bookmark or hyperlink anchor in the InDesign document you specify.
Go To [page]
Jumps to the first, last, previous, or next page in the PDF document. Select an option from the Zoom menu to determine how the page is displayed.
Go To Previous View
Jumps to the most recently viewed page in the PDF document, or returns to the last used zoom size.
Go To Next View
Jumps to a page after going to the previous view. In the same way that a Forward button is available in a web browser only after someone clicks the Back button, this option is available only if the user has jumped to a previous view.
Go To URL
Opens the web page of the specified URL.
Movie
Lets you play, pause, stop, or resume the selected movie. Only movies that have been added to the document appear in the Movie menu.
Open File
Launches and opens the file that you specify. If you specify a file that is not PDF, the reader needs the native application to open it successfully. Specify an absolute pathname (such as C:\docs\sample.pdf).
Show/Hide Fields
Toggles between showing and hiding a field in a PDF document.
Sound
Lets you play, pause, stop, or resume the selected sound clip. Only sound clips that have been added to the document appear in the Sound menu.
View Zoom
Displays the page according to the zoom option you specify. You can change the page zoom level (such as Actual Size), the page layout (such as Continuous - Facing), or the rotation orientation.
Andrew