In Cubase 8.5.15, when I clicked a second time on the Inserts and Sends Tabs on the Channel Settings or on the Control Room or Meter Tabs on the Control Room Mixer, the Tabs switched to their corresponding Subtabs (Inserts from Effects to Routing, Sends from Destinations to Panorama, Meter from Master to Loudness etc.) Not working since 8.5.20 anymore. This was a great little workflow enhancement because you didn’t have to move your mouse all the way down to get to the Subtabs.