Prerequisites
Before you begin, make sure:
You have the admin role.
Step-by-Step Instructions
Step 1: Navigate to Purchase Orders
Log in and switch to Admin > Configurations > Company Settings.
Go to the Purchase Orders section.
Step 2: Enable Custom PO Number Printing
Find and enable the setting "Print Custom PO # on the purchase order".
Once enabled, click on Save.
Related Article: How to Enable Custom PO Numbers?