Switching from the 3D-model to the sheet in which the model is represented in, e.g. a standaard 4 view-ports (top, right-side, front and iso-metric), one can close the 3D and in the Concept Explorer turn layers on or off to have a clear view on one of the two.
This switching between 3D-modelling and 2D-sheet seems in this way a tedious and time consuming method.
When one chose for 2-viewports or tile, e.g. 2, one should expect to be able to work in the sheet or in the model by turning on or off the layers relevant for the sheet only or for the model only.
This seems not possible.
Also, changing the model in 3D, one has to make a new view of the changed model, to get the changed model in the sheet (by changing the view in one of the viewports to the new view of the changed model). This is strange as one of the options in the Change Viewe – option is Dynamic View. One should expect that this Dynamic View represent the current Dynamic View. This is not he case.

Summary: what is a good way to switch between 3D-modelling and 2D-sheet .