'Rebuild Style' behaviour with different changes in Parent & Child Style ?

[kurti]

hi,
when i "Rebuild Styles" (in Update Counters)
how does this affect changes i made differently in
the same template each in the parent and child style?

like... i made changes in the child style...
and different changes in the same template in the parent style.
i see now that the changes in made in the parent style don't appear in the child style.
so i guess i must "Rebuild Styles" now? i wonder now what exactly happens...

will the child style template be completely overwritten by the template of the
parent style? and the changes i made only in child style will be gone?
or does it merge all changes in the child template?