If you want to know exactly what happened with a balance - and want an overview of all requests, write-offs and additions - you can go to the Mutation Overview.
This overview is particularly useful if you want to know how the current balance came to be. When and how many hours were added/removed/expired?
Go to Employees and click on the employee whose mutation overview you want to see;
You will see different counters on the page, click on the balance of which you want to see the mutations;
In the top table you can already see what has been added, what someone has taken with them and what has been written off.
Would you like to see more details, such as what write-offs have been made? Then click on All Mutations Per Year.