https://www.steinberg.net/forums/viewtopic.php?f=250&t=109659
What a beautiful and powerful editing aid that would be!
+1.001
+1
In the meantime, here is a workaround for a similar effect (does not involve the Lower Zone, and I have not confirmed it works in Cubase 9.0.1):
https://www.steinberg.net/forums/viewtopic.php?f=146&t=80503
+1
Regards. 
+1
+1