Pick Save as PDF to choose a filename and destination, and you can even add password protection to the document if you want to. There's PDF functionality built right into Finder as well.

Different formats can also make managing several documents cumbersome. Combining these documents into a single PDF file may be helpful for personal or professional use, to deliver simplified, ...

How to Save an Invoice As a PDF File in Quickbooks. Intuit designed the QuickBooks financial software to handle most business accounting needs, including generating invoices for customers.

Preview automatically fills in the current PDF’s name. To avoid overwriting that file, enter a new descriptive name and click Save.