On the Sales Order level there are a number of Invoice buttons to choose from. Dependant on what financial package the invoice buttons will change. For this instance, we will assume you have the Ascent Financial Plugin (AFP)
A pro-forma invoice is used BEFORE the user packs out the Sales Order. This is used for customers that need the invoice to be paid before they pack out that sales order
This button would be used AFTER the user packs out the Sales Order.
Drop Ship Orders
After you change the PO status to “Complete”, you will have drop ship items showing on the Invoice.
Here is a look at what an AFP invoice looks like