The simple-print-port function prints the output pane specified by port to the default printer, unless specified otherwise by printer . The arguments of scale and dpi are used to determine how to transform the output pane's coordinate space to physical units. There meaning here is the same as in get-page-area, except that scale may also take the value :scale-to-fit , in which case the pane is printed as large as possible on a single sheet.
The background color of the pane is ignored, and the value given by background is used instead. This defaults to :white .
If interactive is t , a print dialog is displayed. This is the default. If interactive is nil , then the document is printed to the current printer without prompting the user.