How can I split a PDF document using PDFpen for iOS?

To extract pages or split a document using PDFpen for iOS use the following steps:

1. Open the document you wish to split.
2. Open Thumbnail view
3. Tap "Edit."
4. Tap the pages you want to be in the new document.
5. Tap "+" then "Create document from pages."

A new 'Untitled' document is created and opened with the selected pages. You'll want to name your document, so once you tap the < to move back to the document view, tap and hold on the filename and choose 'rename' to rename it.