Enable the Transaction Type Footer Narrative?

From the toolbar select System Admin

Then select Setup

Scroll to Transaction Types

Then select the transaction type you wish to enable Footer Narrative on

Select the Interfaces tab, ensure it is not linked to a Cashbook account, if it is you cannot enable Footer Narrative

Set the flag Footer Narrative to Yes

From the toolbar select Sales Ledger

Then select Customers

Scroll to the Customer you wish to setup with Footer Narrative

Select the Customer tab

Select the Invoice Narrative subtab

Enter the Payment Method you wish to have contain Footer Narrative

Enter the Invoice Format you use

Enter the Footer Narrative you wish to write to transactions