There are a couple steps issuers can take for printing multiple certificates.
1. First, you must download the desired number of certificates by selecting the recipients in the group created for that course. Click on Download PDFs.
2. Next, a zip file of the certificates selected would be created since it is a large amount of data. Send this file to your desired email address and download the folder.
3. From here you can print each certificate separately or by selecting them all in the folder to print (command + A for Macs or Ctrl + A if you have a PC).
And voila! You have printed all the certificates for your course!