I launched PDFPen, but nothing happened. Whats wrong?
Look for the PDFpen icon is in the Dock. If you click you’ll see that the upper-left text in the menu bar changes to “PDFpen”. To proceed, select: “File >Open…” from the menu. PDFpen needs you to open a PDF file to begin. If you prefer to start from scratch select “File >New Blank Document” and then select “Edit >Insert Blank Page”.