You can share your PDFs or pages of a PDF with other people or apps.
Open the PDF document you would like to share.
Tap the share button in the action bar on the top of the screen.
Select an app for sharing, or press "Open" to see a list of apps for opening the PDF.
Inside the "Share..." dialog you can customize the shared document. You can choose the document name, the pages you want to share, and whether you would like to keep annotations, flatten them onto the document, or entirely remove all annotations before sharing.
Press "Share" to complete the action.