You can send a PDF file to this machine to directly print it. With PDF Print Direct, you can omit opening the PDF file with an application, such as Adobe Reader.
The paper size depends on the [PDF Paper Size] setting from [Device Settings] > [Admin Setup] > [Print Setup] > [PS Setup] on the touch panel.
For Windows, install PDF Print Direct beforehand.
Right-click a PDF file to print, and then select [PDF Print Direct].
Select a printer to use.
To set the user authentication function with the selected printer, select [User Auth] from the [Printer Setting] menu.
To print an encrypted file, select the [Setting Password] check box, and then enter the password.
If the same password is to be used again, click [Save Password].
Change other settings if necessary, and then click [Print].
For Mac OS X
Select [Printers & Scanners] in [System Preferences].
Check that the [OKI C542] icon is listed.
Drag the icon of the driver to the desktop or Dock.
Drag the file you want to print to the driver icon.