Can someone tell me how to get the instrument interface graphics to remain viewable in the multidock?  Each time I open a song, the instrument interfaces have disappeared.  I'm running version Professional 2017.9.
 
Also is there a place where I can read the current updated capabilities for Sonar Pro?
 
Thank you!

How do you get it in the multidoc in the first place?
 
I see you have the Roland Quad Capture
(your sig says Quad Core - I don't think there ever was such a device)
 
I have the Octa Capture which probably works pretty similar.
I'd be interested to try.

Thank you J.P.,
 
I loaded my instruments into the multidock by right clicking on the interface and choosing "dock in multidock".
I ALSO held down the control key and dragged them into the multidock.
 
Any recommendations?
p.s. You're right about the Quad Capture.

I didn't know that was possible. Very convenient, thanks for the tip!
 
What I'm finding is, if I manually save the song, even if I have nothing to save, the instrument remains docked. - Or the other way around. If I remove an instrument from the multidock, then close without saving, it will be in the multidock if I reopen the song.
 
I also found not all instruments have this feature. It has nothing to do with 32 or 64 bits, nor whether it is a Sonar or a 3rd party instrument. FM8 can be docked.
 
But never do the instruments disappear totally. However, if I disable floating, they seem to hide behind other windows. If the instrument window is floating (not in the dock), there is a pin in the top right-hand corner. Your issue may have something to do with this?