If you add a comment into a part, it appears in it's "Comments" folder.
If you add a comment into a assembly, it appears in it's "Comments" folder.

If you add a comment into a subassembly, it appears not only in it's "Comments" folder, but also if the pointer comes to rest over the subassembly title.

I have a couple of questions.
1) Is it possible to make the (1st) comment to appear when the pointer hovers over the title bar for both a part and an assembly?
2) Is it possible to make the (1st) comment to appear when the pointer hovers over the title of a subassembly or part, when used in an assembly? Rather than having to re-enter the comment in every assembly that they are used in.