In the Persons module, person fields are used to store information about people. Many useful fields (such as first name, surname, email address, etc.) have already been created to make managing your personal data as easy as possible. Of course, you can adapt these fields to the needs of your congregation or even delete them.
Some fields cannot be deleted and some cannot be edited, as otherwise other functions in your ChurchTools would no longer be usable. You can see this by the fact that the information is grayed out.
You also have the option of creating your own fields for people so that you can enter exactly the data that makes sense for your congregation. You can find out how to create your own person fields here.