Hi Petr,

> It means this will be another case when the parent style
> is changing somehow unintentionally? But I think it will
> be ok.

Actually that shift+control should not make any difference for whether the parent object style will change or not.

The parent object will get set if you had a solid that had "whole object selection" on it (selected by the first single click before any drill-down), whether you had shift+control down or nothing down.

The other special "shift to set parent object only" only applies if you have shift all by itself down and not also control along with it.

- Michael