In the Printer Options screen, you’ll see a preview. You can either Pinch and Expand it or Poke it (the harder 3D Touch).
A PDF preview window opens. As shown in picture-
Tap the Share button at the bottom (For 5s) or top Right (For 6 or 7S) of that window.
You can choose any Share option, "Copy to Acrobat" including Copy to, switch to an app that supports PDFs into which you can paste, share it Dropbox, add it to iCloud Drive, and the like. (similar to the image below)
Once it’s shared, tap the back arrow (upper left), and then tap Cancel.