To enable the drop-down selector for Splits there are 3 options for field names, of which one must be called in the Output. 

• {Selector} - Will show all Splits and Legs in the drop-down
• {Selector.Splits} - Will show all Splits only in the drop-down
• {Selector.Legs} - Will show all Legs only in the drop-down

With these prefixes the standard Split/Leg field names can then be appended in the same way where {Selector} would be replaced by the selected Split or Leg name. 

For example {Selector.Legs}.Distance would return the distance for the Leg selected from the drop-down. 

Splits which are set to Internal Only will not be shown in the Selector or called in the <Last Results Hereof> option.