Almost every day, I receive e-mails with PDF files attached that are scans of pleadings, briefs, exhibits, etc., either because someone scans something and e-mails it to me, or because someone faxes something to me. (My law firm automatically converts all faxes to PDF files and then e-mails the file to the recipients.) Every once in a while, someone will scan or fax a document upside down. On a computer, this is only a minor inconvenience; I can just use the rotate command to rotate the image 180ยบ to fix it.
On the iPhone, however, the solution is not so obvious. When you get an upside down PDF, your natural inclination is to just rotate your iPhone, but as you do so, the image on the screen rotates with you, so it remains in the upside down position. The result is frustrating, albeit mildly comical.
The solution is to hold a finger down on your screen and then rotate your iPhone so that it is upside down. Do not move your finger while you are rotating. Your finger on the screen prevents the iPhone from rotating while you turn it. When you are finished, your iPhone will be upside down, but the PDF will appear right side up.