Option to show in-laws

[aaannndddyyy]

When I center the tree on a married person, that person's parents and children and partner are shown, but the parents-in-law and brother-in-law are not.
I can only see them if I center the tree on the partner , but then the first person's parents are gone, or on the children - but if they don't have children, you never get a view with your in-laws.
That is good when you want to see only blood-related family, but bad otherwise.
I suggest a knob similar to "show siblings"

[michelesalvador]

This would be perfectly possible on a 3D diagram.
But take a look to this simple example:

There is no obvious place to expand parents-in-law (1-2 and 3-4).
Surely lines would cross each other.
And moreover I see no room to display any sibling-in-law, especially around Wife 1.

[aaannndddyyy]

Why would you place the pivot person ("Me") in the middle of the siblings? Of course, then there's no space for in-laws. I'd put all siblings to one side, then pivoted person and spouse on the other side. From spouse you can easily go up and sideways