The copy command places a copy of everything selected onto the Macintosh clipboard. (Cut works the same, except that the selected events are then deleted.) It stays on the clipboard until you copy something else. You can copy any selection of notes and controllers, even if there is more than one Player involved. This lets you move entire stretches of music in a single operation.
When you copy notes that are in a playback loop, only the source notes are copied to the clipboard; the notes generated by the playback loop (i.e. the notes in the playback loop with the squared-off edges) do not copy.
When you copy while viewing a song, a copy of the selection will be placed on the clipboard for each instance of its section in the current song. For example if I have put five copies of “Chorus” in my song, and I copy some music from “Chorus” I will wind up with five repetitions of the events on the clipboard. This may or may not be what you intended. In general it is less confusing and error prone to copy and paste when viewing a section.
