===Invoice Charges===
Items defined as "Invoice charges" will appear in a selector list on the booking invoice for easily adding a pre-set charge to a booking. These are internal invoice items which can be added from the control panel, they do not show on the booking page. After they have been set up they are available under "Charges" in a drop-down list in the "Invoice and Charges" tab of the booking.
[[Template Variables|Template Variables]] can be used to display invoice charges in invoices, booking templates or Email templates.
===Invoice Number===