Richard,

You are right, if you filter notes in a region, the copy command
(Contr+C) does only copy the complete track, not the filtered notes.

Mark as you suggested, to use SHIFT+DOWNArrow, does not shift the selected notes to the lower track. I searched the help - userguide - and could not find this command, but remember that it should work that way??

I fully agree Sherry's way, as Mark confirmed is the way to do it.

Cheers Jaap