How to add an annex?
From the three dots in the contract table, you'll find the option to "Add annex". By adding one, you will generate a modification to the current contract, which can impact all its sections. In this way, when you create an annex, you're effectively creating an appendix to the contract.
For example, if you modify the job position and contract end date in the annex, these values will be the employee's current details, while the rest of the contract values (such as type of working hours, total hours, etc.) will remain in effect.