How to offer free shipping when sending a draft invoice?

[Schimke]

Is there a way to offer customers free shipping when sending a draft invoice? I found the thread below and it appears several people are having the same problem. 

https://community.shopify.com/c/payments-shipping-and/selecting-local-pickup-for-draft-invoices-emai...

[Schimke]

Well, as is often the case, just after I posted this, I figured out how to do it. For those that may be wondering, you fill out your draft invoice like normal. In the "Payment" section, click on "Shipping" and simply choose "Free Shipping".