Changing a team is very easy in todo4teams. You click on a team in the overview and the dialog for changing a team opens immediately. There you make the appropriate changes and press “Save”: The mandatory field

*Name

is marked with a red star. If a mandatory field is invalid (e.g. if you delete the name of the team), it is highlighted in red and the "Save" button is deactivated so that the team cannot be saved in an inconsistent state:

If you have made changes to a team and have not yet saved them, todo4teams will ask you whether you want to save or discard the changes so that changes are not accidentally lost: