How to configure keyword in Purchase Order Search?

Summary:

We have different DFFs on Purchase Order Header and we want to search the Purchase Order with the DFF Values.

We dont see the DFF values in the Purchase order search screen and that is why Keyword functionality can be used in this case.

Can you share any documentation?

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable): 24C

Code Snippet (add any code snippets that support your topic, if applicable):