1. To map fields, click an attribute group in the Marketing Cloud column to locate a specific attribute.
2. To view its path, hover over the name of the data extension.
3. Drag a Marketing Cloud attribute to the Sales and Service Cloud case value it populates.
4. To select the desired field type, use the dropdown menu next to the Sales and Service Cloud search field.
5. To show fields not matched to a Marketing Cloud attribute, select Hide Defined Fields.