Customizing the Accounts Receivable Write-Off Page
The accounts receivable write-off process uses a field set to enable you to customize the content and layout of the page.
The Accounts Receivable Write-Off Preview Columns field set on the Transaction Line Item object enables you to add and arrange columns on the preview and select records page.
See Editing Field Sets and “Creating and Editing Field Sets" in the Salesforce Help for more information on using field sets.