The mxnmultiwidget could easily be used to provide some predefined layouts so that the user can easily setup the view editor.
This could be done by using either
- the layout widget of the configuration toolbar
- the render window menu
Additionally this task can be combined with T26550, where a json file is used to store / load user defined overlay configurations. The json file potentially needs to know / define the multi widget layout in order to set the overlays for each render window in the current layout.