The major advantage of this is that because we use different views of the same model, as that model is altered, so all of the views are altered to reflect the changes. A rectangle is drawn and inside the last view of the model is displayed. The crosshair cursor disappears and is replaced with an arrow, until the cursor is placed over the first viewport, when it returns to a crosshair but only in that viewport. The UCS Icon returns to the familiar icon, either perspective or orthogonal in each viewport. Remeber that Model Space is where we create the model, and Paper Space is where we create the plot.
Lets restore a different saved view.
Adjust the layers in this viewport and return to Paper Space, and finally add some text in paper space to the drawing. Because you are working in Paper Space, on an A4 sheet, if you want 3mm high text set the height to 3 units etc. So far so easy. But as we know AutoCAD uses Wireframe 3D models until we tell it otherwise, and this includes plotting from Paper Space. This will give you an on screen preview of the final plot, and if all is well you should get a hidden line view of part of on of the viewports.