Hello Chandan,
First of all thanks for the reply.
Problem is that I can't set the field to be a list because the extensibilty explorer doesn't give me the option to change the display types of fields.
Like I said I'm talking about a standard Business Object 'Business Partner', so I'm using the "Enhance Screens" function of Cloud Application Studio.
So when I use the "Add Extension Fields to Section Group" operation of the Extensibility Explorer and add my "Quality" extension field, it automatically set's it to a drop down. But when I go into Adaptation Mode and look for my Extension Field, it's not in the list of Extension Fields of Adaptation Mode.