How to add an obligatory extra?

•    Go to Configuration>Catalogs and Prices and select the Catalog for the year you wish to modify.
•    Click the Extras button. This will display a list of your existing extras for that catalog.
•    Click the Add extra button to insert a new extra.
•    Click the “+” button to choose to which yachts the new extra applies.
•    Check the box Obligatory in order to make this extra (Final Cleaning for example) mandatory. Click Save when done.
•    Check the box Pay at Base if the extra is payable at base.
•    If an extra is not present in the default list, insert it with the title “Default” and put in the name under Annotation.