Are you asking about controlling the Preview image that we see to the left of the Type Selector?
The view that is open when you save and close a family is used as the preview.
Fine tune the appearance of that view and make sure it is the only view of the family that is open, save and close.
FWIW, Temporary Hide/Isolate works to hide parts of the family that make it hard to determine what the family is, for example connectors or hosting elements like walls, or a face. Just make sure you use it before saving and closing.
Steve Stafford
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