Can we add a custom field for adding line items within a document? I don't want to include the entire estimate, but I want to be able to type in line items with a description and a price, just like we would if we were creating an estimate. I want these fields to populate when creating the document so we can type in the description and price and have it look presentable to the customer. I am currently manually doing this, and the spacing doesn't look great and its time consuming to try to align everything.