How can I set 'Print to File' as my default printing option?

Solution 1:

Stop cupsd by running

sudo stop cups

Then edit /etc/cups/printers.conf with your favourite editor.

Find the line that says

<DefaultPrinter somename>

And change it to

<Printer somename>

Then start cupsd with

sudo start cups

And that should remove the default printer thus reverting print to file as the default.