- From the main screen document view, tap the 'SELECT' button, the circles will appear.
- Select the documents you wish to merge.
- Next, tap 'Join' from the top of the screen.
- Move them into the order of your liking by dragging them with drag icons on the right of each PDF.
- Tap Join and a new document will be created named 'Untitled' and added to your documents view.
- Tap on the name to rename it.
(Applicable for PDFpen 3 and iOS 11 or above)