You are able to add additional text and to modify fields on your customer invoice printouts by using the customer forms designer.
To add the new text field or modify an existing field, follow the steps below:
Go to Setups, Customers, Forms Designer, Invoice.
Select the Form Code you want to modify.
Scroll down the Form to the area you want to add the new field or modify the existing field.
Add the new text field by clicking on the A icon at the top of the form. This will create a + sign on the form when you hover with your mouse.
Hold down your left mouse button and draw out a box on the form where you want to place the text. Release your mouse button when it looks ok.
Now you need to modify the field by double clicking on it and entering the text you want or changing existing text. Click OK when you have finished.
Check another field in the same area of the form to see what font is used in that field.
If required, go back and edit the field you created again to select the font.
When you are happy with the changes you have made click the Disk icon to save the form.
Do an invoice reprint to make sure that the changes you have made look correct on the printed Invoice.