Sometimes, no form of wireless printing from your iPad is adequate� for example, you may need to use special features on your printer such as duplexing or n-up printing that are unavailable in AirPrint or thirdparty printing apps. In these situations, the path of least resistance is to send the documents to a computer, and print from there. Assuming you have access to a computer that�s connected to a printer, it�s a method that nearly always works.
Earlier, in Transfer and View Documents, I provided an overview of some of the many ways you can copy a document from an iPad app to a computer. To review some of the key options:
� Use iTunes to transfer the document to a computer. This requires you to attach the iPad to the computer with a USB cable, so the iPad and the computer must be in the same physical location. (If you want to print via someone else�s computer, be certain to turn off syncing in the iTunes preferences before you make the connection.)
� Use a third-party app to transfer the document wirelessly to the computer, possibly via a cloud-based service such as Dropbox.
� Email the document to yourself, or to someone else who can access a printer, as an attachment.
Another option is also worth mentioning: fax. If you find yourself in need of a hard copy in a location where there�s no printer to be found, you may be able to locate a fax machine. If so, you could use an emailto- fax service such as jConnect (http://www.j2.com/). Email the document to a special address provided by the service to send it to the nearest fax machine, and you�ll have a quick, albeit low-resolution, hard copy.
Source of Information : TidBITS-Take Control of Working with Your iPad 2011