I had a bit of trouble working this out the first time too, as you can't seem to get useful results using the PCB Print under Documentation Outputs. A bit of googling found the answer, but I can't remember where.
1) Create a new Fabrication Output of type Final Artwork Print in your Output Job
2) In the Print Properties, add/remove the Printout and Layer settings you want
3) In Page Setup, set Scale Mode to Scaled Print, with Scale of 1.00