Vehicles that might use the parking area are split into groups known as vehicle classes. Typically each vehicle class has different parking requirements.
Click on the Vehicle Classes tab.
The defined vehicle classes are listed in the large window. As you move the cursor between the entries, the edit boxes beneath show the values associated with the selected vehicle class.
Set the Vehicle class to the name of the class.
Set the Default bay length to the length of bay required for this class of vehicle.
Set the Default bay width to the width of bay required for this class of vehicle.
Click New to add a new vehicle class. Highlight a vehicle class and click Duplicate to create a copy of an existing class or click Delete to delete the selected class.