In this document, you will find the process of creating a new add-on within a reservation.
Select the reservation you wish to include a new add-on in. Select Add-Ons.
Select +Addon and choose from the dropdown list.
Next you will be directed to a page where you can select the dates in which the add-on will be in use.
Once you have selected your dates, you will now see the add-on within the Addons tab.