Making field settings
On Details > Fields you can:
set field attributes (see Setting field attributes)
modify the field type for some fields (see Modifying the field type)
modify the translation of a field name
On Details > Actions you can enter or modify the translations for the actions of a business object.
On Details > Links you can enter or modify the translations of business object links, but you can also add multiple-selection lists to the selected business object here (see Linking Multiple-Selection Lists to Business Objects).
On Details > Statuses you can create user-defined statuses (see Creating user statuses).
On Details > Display types you can maintain display types of a business object (see Configuring Display Types).