ronen
1Password 8 is a completely new app and all features haven't yet made it into the app. We do have an open feature request to bring printing to 1Password 8 and I've added your voice there so that the product team is aware that this is something that you'd like to see.
That being said, I generally don't recommend that you print your passwords since that will remove them from the secure and encrypted environment of 1Password. Any exported or printed copy of your passwords will be in plain text and so will be readable by anyone who views it. Most importantly, 1Password's protections and security will no longer apply to your passwords.
1Password is designed to allow you to easily browse and review your items inside of the 1Password app itself. Can you tell me a little more about why you'd like to view your items in a PDF rather than from inside of the app? If you can provide me with specific feedback then I can pass that along to the product team so that they can look into improving the app so that you don't need to print your items at all in the future.
-Dave
ref: IDEA-I-1458