You can save Views of the Floor Plan and store them with different scale settings. Then you can just activate the View you need.
You can use either the Worksheet Tool or the Detail Tool for the Callout.
Please note that these will not be model Viewpoints anymore, only Drawings.
This means that you will not be able to edit your model in these "Callout" viewpoints.
When they are created they will appear in the Project Map among Viewpoints. You can then open them and set the scale to the desired value.
As far as 3D: you can save cameras and save Views of the 3D Window with those settings. But these will not be separate Viewpoints, only the same Viewpoint saved with different settings.
If you create a 3D Document, on the other hand, that creates new Viewpoints.
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