Setup->Paper Size
The Paper Size page specifies the paper sizes which are supported by the printer.
Paper Size list
In the Paper Size list, you can:
Select the paper size to be installed.
Right click or double click to set the default paper size.
Select / deselect all
Acts as switch to Select All/Deselect All, you can click on it to toggle its state.
Help
Clicking this button loads the help file, and displays the Setup->Paper Size topic.