An object that with-print-job uses when a pane is not supplied.
The class printer-port
is the class of the object that with-print-job binds its
var
argument to when it is not given a pane.
printer-port
is a graphics port, which is described in Drawing - Graphics Ports and GRAPHICS-PORTS Reference Entries.
The phrase "printer port" refers to either to an instance of printer-port
or an instance of output-pane when it is used as the pane argument to with-printer-job.
CAPI User Guide and Reference Manual (Macintosh version) - 25 Feb 2015