From the event “dashboard” click on the “Onsite check-in” from the side bar. 

Now click on the “Manage Locations” under the Locations tab on the left-hand side of the screen.

Click on the “add location” button and a “create new location” modal will appear. 

Fill in the “title” i.e name of the location, you can optionally add an address for the location. 

You can create multiple such locations for your event. 

How to add multiple check-in locations to your event?