Change the format of the Reason - field in Cancel Requisition

Summary:

Reason field - Cancel Requisition

Content (required):

When changing the format of the Reason - field in Cancel Requisition, through a sandbox, we could only find the option to make the field mandatory. We need to change the format of the field, from text box to list of values, and include the necessary values according to the customer's need. The problem is that inside the sandbox we can't see the option to change the format of the field.

Below is the print showing which field we are talking about:

Can you help us with this problem?

Thanks.

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