On page 65 of the manual, it says that clicking the hierarchy button on the Piano Roll editor will display the contents of all tracks in the Arrange page. If I could do that ( plus excluding the muted regions from such display) it would be very convenient to toggle back and forth between editing one part and how it is in relationship with an ensemble. If there is a hierarchy button, I can't find it. Is it in a different place that usual? I do have visual problems.... Let's get one, and have it do just what it says, also with the ability to hide muted tracks and/or regions.