The Lengths area is used to enter the length of an alternative revenue item accepted by your station. Lengths are available for selection, when activated as an attribute to use in the inventory type details (Inventory Type Details), during the alternative revenue schedule line entry process.
To enter a new length, click in the cell next to the asterisk. The length may be edited or deleted (by clicking the red X button) at any time, but the changes will affect only orders entered after the change was made.