Open or create a new document
Tap the Action button
Select any of the following options:
To open the PDF in another compatible app installed on your iPad, tap Open PDF In... and then select the app.
To send the PDF to the iTunes shared folder select Send PDF to Shared Folder and use iTunes to transfer the file to your computer.
To send the PDF to the default Dropbox documents folder select Send PDF to Dropbox. Set the default Dropbox documents folder in Settings > Configure Dropbox.