In invoicing, you can create custom fields that are then available in your invoice template. Please note that your self-created invoice template is not automatically populated with the new fields. You must integrate these fields yourself in the database query and also in your report. Instructions for this can be found here.
To display a custom field, right-click in the free area, then select "Display" and the corresponding field:
In the next step, right-click on the heading of a user-defined field and change the name in the dialog box that appears.
