3D dimensions can be a good way to drive changes to a model. The problem is that if you create several of these per part and have an assembly of hundreds of parts, the display gets cluttered with all of those 3D dimensions. The only option at this point in the base module is to use the Show menu to have all labels on or off in the viewport.
I would like the ability to show/hide 3D dimensions in the base product. One option for doing this would be a setting where the dimensions (and all other labels) on a part are displayed when the part is set active and hidden when the part is not the active part.