Design and build your document auto-numbering scheme.
You can choose to create your scheme using document fields, project fields, or a combination of both.
If you cannot access document autonumbering, you may need to enable document auto-numbering on your project first. See the document auto-numbering overview for more information.
If you want to use a project field in your scheme it must be mandatory and codes must be enabled for it. Codes can be enabled when editing the project field.
If you need to, you can add or remove project fields from the document type, or change the order.
If the document type list is empty make sure you've applied your project fields to your document types.