Use tempo sets
When Show Advanced Tools is selected in the Advanced preferences pane, you can create tempo sets, and choose between different tempo sets in a project. Only tempo changes that are part of the current set appear in the Tempo track and Tempo List. When you create new tempo changes, they become part of the current tempo set.
Create a tempo set
In the Tempo List, choose New Set from the Tempo Set pop-up menu.
When you create a new tempo set, previously added tempo changes are no longer visible in the Tempo track or Tempo List. When you create new tempo changes, they become part of the current tempo set. The initial tempo is always visible.
Rename a tempo set
Select the tempo set, then choose Rename Set from the Tempo Set pop-up menu.
Enter a new name for the tempo set, then click OK.
Choose a tempo set
In the Tempo List, choose a set from the Tempo Set pop-up menu.
When you choose a tempo set, only tempo changes that are part of the set appear in the Tempo track and Tempo List.
Delete a tempo set
Select the tempo set, then choose Delete Set from the Tempo Set pop-up menu.