Clicking PrimoPDF's Drop Files icon opens the main interface, which is where you configure the program's settings and options. This compact console is simple enough, though not the most intuitive in its layout or design, though you only need to access it when you want to change your settings. Clicking the blue info button opened a pop-up linking to an online manual, or so we hoped, though what we got was a 404 page, and the Web site wasn't much better. PrimoPDF isn't challenging to learn or use, though, and we had no trouble setting the program's options, including Document Properties and PDF Security (which includes password protection). PrimoPDF can generate PDFs optimized for various displays: Screen, eBook, Print, Prepress, and Custom. The program offers three Post Process options, too: Open PDF, Email PDF, and Do Nothing. You can even designate a specific PDF reader to open documents created with PrimoPDF, or use your default reader. To create PDFs from the Print command, simply press your app or document's Print button and choose PrimoPDF from the Printer list, just like you were printing a page.