1. Navigate to Analysis > Information Library
  2. Click Add ad-hoc query and select source view: Sales Order
  3. From the left column, select Delivery method. From the middle column, drag Name into Include records where. Set Equal to: Will Call (type this exactly) and click OK.
  4. From the left, expand Sales Order Item > expand Sales Order Item Ticket > Select Program Event. From the middle, drag Event record into Include records where. Set Equal to your program event. Click OK.

For more information on printing Will Call tickets, please refer here.