Currently, when you add a new map window the editor appears to have default values for the stacking options.
However, this means that if a module designer wants a different stacking behavior in their module, they have to change this for every map window manually. (this isn’t hard, but it is extra work)
I would suggest instead that instead of using default values, only the “Main Map” should use the default values when creating a new module (or adding a New Map Window if none currently exist). When adding additional Map Windows, the stacking values should simply replicate the previous map window stacking values.
This change would ensure that stacking behavior in a module is consistent unless the design deliberately changes it, rather than having the editor introduce inconsistent behavior.