So, I have tried this on 10 midi projects in a row, Same each time.
 
The shortcut key "D" to show\hide the multi dock does not work the first time on a project. You have to go to the view menu, select event view or something similar.  then the D shortcut works like before.
BUT, once you close the project and re open it you have to go thru the same process again? 
 
Tried re assigning it, no help. Not a big deal, just, well, How Come? C works fine for Control bar

If there is nothing in the dock, there is nothing for D to do. Seems work the same in SONAR.

Just seems different. Hmmm? Just weird why I would do anything differently since I have been using Sonar forever, plat since day one also. I have double click track set to open event list usually. I guess I always double clicked on a track before using D command
 
Isn't it strange how my mind was looking for something different I guess.
 
Thanks Scook

This is one reason I keep old versions online. When something seems odd in a new version, I check the old version.