Custom fields in PaperOffice are fields that can be stored in the properties of a document.
You can create as many custom fields in PaperOffice as you want, for example, to note information that does not contain the added document or file and then to search for it explicitly. Insert e.g. the name of a specialist consultant, the delivery date, the customer number or a contract number or simply create booking accounts, fill them with values and export them later.
All created user-defined fields are directly available in the document's properties.