This tab is in the Sport Setup tab.
The Stages tab is used to define the names used for the different stages of progression in events. Typical names are "Heat" and "Final". You may also have "Semifinal", "Quarterfinal", or any other name.
The ID field is the unique ID for this Stage. The default ID prefix is S.
The Name field is the name of the stage.
The Number field is the number of the stage.
The Is Final field is true for the final stage.