After designing your event's badge, you can download a badge on an individual guest's badge from the check-in feature. Here is the guide for you to print your event's badge, if you haven't set up the badge template, you can customize the event badge template first here.
Login to https://onsiteapp.eventnook.com
Go to My Events → Dashboard
Click on Manage on the left → Attendees, and click the View on one of the attendees.
Click on Print button to download the badge in PDF to a printer, you can also select the Badge button to see the preview first