...
Depending on the selected Vacation type you will be redirected to Vacation definition view with different fields enabled for Vacation type. Visit Adding Vacation definition.
NOTE: 
Add vacation button is disabled if selected vacation type is recurring and user has defined Vacation definition for this vacation type. Recurring vacation types could have associated only one definition and it will be renewed automatically when period ends.
To view details of user vacation definition click Details button associated with each user. You will be redirected to view dedicated to selected vacation type. Visit Vacation definition detailed view.
NOTE: Details button is disabled if user has no defined vacation definition for selected vacation type.
...