MS4 Playing a Part
Hello, in MS3 when I want to play an instrument of a score there is the option "Play only the part" which, if deselected, allows you to play a part with a volume and, perhaps, the other instruments with a smaller volume (I need it to prepare Tutorials). 
Trying to do the same thing in MS4 I do not find the option "Play only the part" that you can select or deselect.. In the mixer the other parts are in Mute and the M button is gray and you can not act on it. 
Can any of you help me find a solution? Or you can't do the same in MS4 as you did in MS3? Thank you for your attention
Comments
So you want to see only one part but hear them all? A way in MU4 would be to do it from the score itself. unchecking the "visible" box for each staff within each instrument that you don't want to see. Not sure if there is an easier way.
In reply to So you want to see only one… by Marc Sabatella
Unfortunately, unchecking the "visible" box for a staff, the mixer automatically puts in "mute" the part and there is no possibility of intervention...
In reply to Unfortunately, unchecking… by belodevici
You’re not hiding the staff; you’re hiding the instrument. You need to expand each instrument one by one and hide its stave)s) while leaving the instrument itself visible.
And no, I don’t like that it is this way and have been fighting to get this improved. And there are plans to revisit the hide/mute association sometime after 4.0 is released. But for now, this is the best we can do, I think.
I don't use MS4, but have you tried to activate the solo button of the other instruments to add their sound?
In reply to I don't use MS4, but have… by HildeK
unfortunately the Solo button is inactive...
In reply to I don't use MS4, but have… by HildeK
Hmmm. In my 3.6.2 I can't deselect that box.
In MU4 beta my solo and mute buttons are active.