By default, the business segments have a generic name, e.g., FIN BSEG 1. A caption can be set that we be shown instead of dimension name as well as for the mandatory Total and NA elements. If you are using FIN BSEG 1 for Cost Centers, you would maintain the Captions for instance like this:
After confirming the dialogue with "Update Captions" the changes will be applied.
Additionally you can set whether a business segment is used, which is especially relevant for the planning equivalent and will be further explained in the chapter about planning setup.