IRT

Edit Notes - to access the "invoice" note field (alternative - click in Note: box)

(see Pre-Defined )

This does not edit a line note on the invoice.  Instead a Note field opens up at the bottom left of the invoicing screen.

Type your note and press F10 to save the note.

The customer invoice will display the information just above the line items purchased.

You can review the notes in Invoice History by choosing the Notes under Properties on the left and read the panel at the bottom of the screen.