PDFpen is a document-based application. With it, you can open existing PDF documents and create new ones.
Opening an Existing PDF
- Choose File > Open (Command+O).
- Find the PDF you want to open, select it and click Open.
Drag and Drop
You can also drag a PDF's file icon and drop it on the PDFpen icon in the Dock to open it.
To re-open a recently opened document, choose File > Open Recent and select from the list.
For information on opening a document stored in iCloud see iCloud and Cloud Storage.