Change PO Email Workflow Notification Subject and/or Body

Using Oracle EBS 12.2

I have workflow builder open, editing the PO Workflow. I know that the emails are being sent with "AME Email PO to the Supplier". I have opened the message "AME PO Email"

Body/Subject shows:

&OPERATING_UNIT_NAME - &DOCUMENT_DISPLAY_NAME &DOCUMENT_NUMBER, &REVISION_NUMBER

Actual sent email shows:

For Your Information: OPERATING_UNIT_NAME - Standard Purchase Order 125309, 0

**Changed actual to "OPERATING_UNIT_NAME" is like this to remove personal information from this question.

Where is "For Your Information: " coming from?

Body/HTML Body shows:

&NOTIFICATION_REGION

Actual email sent is very complex with a table etc..