Aloha f,
Nice idea.
I believe there is an app that puts a ‘shelf’ on the desktop (Mac)
on which you can drop all sorts of things but I don’t think it will work inside Cubase
for MIDI events.
What I do as a quick work-a-round is to:
Just save the entire current song with a different name/title.
and keep keep working on the current song.
And then later when I have time I will open that saved song,
delete all the non-relevant parts, hit save and ‘bob’s yer uncle’.
A lil klugy but it does not stop my workflow.
HTH
{‘-’}