Show variants on Packing Slip Customization

Hi there, I’m customizing the Packing Slip Template on Shopify (no Plus) and I want to have a preview to test if the variables that I display are correctly configured.

This is the code:


                

 
                    **Customer Tag:**
                    {% if customer.tag %} {{ customer.tag }}
                    {% else %} Not assigned {% endif %}
                

            
                

 
                    **Shipping Method:**
                    {% if checkout.shipping_method.title %}
                        {{ checkout.shipping_method.title }}
                        {% else %} Not assigned
                    {% endif %}
                

 
        

But when I test the preview I have the “Not assigned” by default.

Is there any option to test a packing slip with an user assigned, to see if that variables are working? What I want is to show the Customer Tag and Shipping Method for the user.

Thank you!