In your original post you ask "are there any plan to include a similar feature into Sonar?
This is a peer to peer forum so we don't know what the team at Cakewalk are planning on doing.
To quote you again "We as Sonar users should make the company take the challenge instead of saying (without any knowledge): just use this or that."
There's no reason why you couldn't put in a feature request for this or any other things you'd like to see added. Its clear that the folks at Cakewalk do listen to their users so why not give it a try. Instead of just hoping that it will happen you could play a part in ensuring it will if its such an important feature for you.
Clearly SONAR doesn't have this feature at the moment so i guess the responders to this thread were just making suggestions as to how you might achieve a similar effect with what SONAR currently has.