How to save a file so I do not have to always add fields every time?

OK, I load a PDF into Acrobat DC, I use Adobe Sign to select people to email it to, and to add signature and date fields (and other fields) for them to complete. I send it. And it is gone. 

How can I SAVE it with all the fields so I can use it with another group of people without haveing to recreate all the fields every time?