Document Numbering for Consignment Purchase Order or Agreement

Hi, Please let us know how to define a custom document numbering format specifically for Consignment Purchase Order/Agreement. At present, it's following the common numbering format for standard POs/Agreements. However, to meet the client's requirement, we need to set up a distinct numbering format for consignment agreement/PO. If it is achievable, please provide the detailed step by step process to accomplish this.

Thanks,

Ritesh