You can select one or more messages to print and you can select an entire conversation for printing.
To send a message to the printer:
Select the message, and click Print.
The selected message appears in a separate window, along with a standard print dialog.
When you select multiple messages they are printed as one printed message.
In the dialog, choose a printer and click Print to send the message to the selected printer.
The default font size for the output is 12 points. You can change the font size that is used from your Preferences>General>Other section.
Note: Do not use the browser's File>Print feature to print your message. The page will not be well-formatted, and your message may be difficult to read.