I experimented and found that textbox cannot be added in part editing mode; however it is shown by default in 2D drawing.
So is annotation note's text box available in 3D part editing?
What is the scenario where you need to use the bounding box for annotation notes in the modelling environment? Also, the example in your image above in drawings does no seem desireable. What is the case where you would have the reference line floating off in space in drawings or in the model?
Retrieving data ...