While in Browse mode, you can modify your Order # (and Op Code if applicable) and Program type by clicking the Edit button on the Invoice header.
Void Invoice
Click Void button to Void the current invoice. Confirm from the dialogue. You can later Unvoid it in case you change your mind or voided the wrong invoice.
Once invoice is voided, there will be an "Unvoid" button available which will allow to to reinstate the voided invoice.
Edit Invoice order#
The Edit button will allow you to modify the Order # (and Op Code if applicable) and Program type for the invoice header.
Save Invoice changes
Once you have modified the invoice header, click Save to save your changes, or Cancel to dispose of the changes you made