With all drop-down lists in Akti, you can manage by yourself which values are available and in which order these values are listed.
This can be done by clicking on "Manage the list" at the bottom of the list. If the list is a bit longer, you might have to scroll down to find the option.
In the pop-up that opens, you can:
Create new values by clicking on Add.
Edit or delete existing values by clicking on Dropdown.
Rearrange existing values by clicking on Cross.
