There is no automatic way to combine multiple orders into a single shipment, however you can so this manually by following the steps below.
1. Print a shipping label for one of the orders, making sure to enter the correct weight and dimensions to account for both orders.
2. Mark the second order as "fulfilled" in your e-commerce store's order management system.
Note: This process will not create a comprehensive packing slip or email notification with all items from both orders.