I have just bought an iPad 3 and downloaded adobe reader. I use gmail for my emails. I can't seem to open PDF documents emailed to me. I don't get the 'open with' option anywhere on the email page. What am I doing wrong?
If you open your gmail emails in Safari, click on the PDF link in the email. The PDF should open in the Safari browser. Click on the middle of the PDF to see the buttons "Open in iBooks" and "Open In...". Click "Open in" and select Adobe Reader.
It looks similar to this screen capture I made in iPhone (can't get my iPad to capture the display to show you).