After some confusion at work around drag controls and the different way reference planes can affect families, I quickly threw this together. I hope it helps anyone else that has been confused by the topic.
Drag controls will be automatically created when an ‘instance based’ dimension is created between two reference planes.
The process is:
1. Create a reference place and create your ‘instance based’ dimension.
2. Check you are not dimensioning to a level or face, otherwise, the drag controls won’t appear.
3. Check the ‘Is reference’ property of the reference plane. This property will affect your family in these ways:
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