If you go to Data -> Reservations -> Reservation history - you can choose between 3 options:
1 month (with details)
shows the changes from the last month with all the details.
3 monthg (with details)
shows the changes from the last 3 month with all the details
unlimite (simplified)
shows all changes done to the reservation, but only limited information is displayed,
A reservation with details looks like this:
same reservation without details: