Hello Richard,

Sherry and Jaap have offered two different ways to do the job. Sherry's way is easier. Jaap's way will work, but two extra steps are needed. First, create a new, empty track below the chord track. After you have filtered (selected) the melody notes, use SHIFT+DOWNArrow to shift the selected notes to the new track below. Actually, Sherry's recommended Split Melody and Accompaniment command in the Staff menu is a whole lot easier; it does the exactly the same thing as all of Jaap's steps, but in one easy command.

Cheers
-- Mark