An optional layout on a Web page that enables only the essential text to print properly. The icons, navigation buttons, ads and graphics on a Web page might cause the text to be truncated or print in a garbled manner. Although more common in years past, the problem still exists, and a printer friendly option removes unwanted objects before printing. See screen capture.
The IRS - Printer Friendly
At the end of filing a tax form on the IRS website, clicking Printer Friendly Version ensures all essential data prints properly.
More Need in the Past
Years ago, The New York Times offered a printer friendly option for its online articles. The combination of more advanced standards and the site's enhanced formatting eliminated that need for the most part.