How can I print multiple documents in one go?

There is a free web app which can help you do this. Just follow these steps:

  1. Go to https://pdfmerge.w69b.com/
  2. Click the blue button 'Select files from Google Drive'
  3. Select your merged documents from the merged folder
  4. Then click the blue 'Merge' button
  5. This will create a single PDF document which you can then print in one go!

Sample: