Here's my situation: I have a 5-part vocal harmony thing I'm working out. I was putting all the parts into a single track, but it was too hard to pick out individual parts, so I decided to split them into individual tracks. I cloned the track four times, and started over.  (My voice leading was crap anyway :-))  Now I select the five tracks and open them in PRV. Trouble is, it's a real pain to see the different parts in PRV because all the tracks are the same color. Is there some easy way to say "Make all the tracks different colors so I can tell them apart?" I don't care what colors they are, just so I can differentiate them in PRV. I know I can change the colors individually, but that's a pain, plus, like most every other option in Sonar, the ability to change the colors of the notes in individual tracks in PRV is hidden away in some secret menu somewhere that I can't find.
 
Another solution would be to visually "solo" a track in PRV, essentially hiding all but one track. I can hide individual tracks, but I don't want to go click-click-click-click all the time just to hide every track EXCEPT the one I want to see. This seems like a frickin' obvious needed feature. Do the devs over there not actually use their product? (Sorry for the snark, but these kinds of things seem so basic to me...)

You can easily switch PRV tracks on/off by clicking the note icon in the Track Pane of the PRV.
 
Colours will follow how you have them set in Track View
 

Have you considered using Staff View instead of PRV? It's very useful for this sort of purpose, i.e. experimenting with harmonies, as it displays the instruments separately, unlike PRV which merges them together.

Otherwise, simply set the track colours and the note colours in PRV will change accordingly.

My color needs are different from Track View and PRV. In Track View, I want sections to be colored the same (Vocals are all white, Strings are all red, etc.) but when I'm wreiting parts for a single section in PRV, then every track within the section needs to be a different color. 
 
@Bristol_Jonesy This is what I was referring to as being way too cumbersome to show only one track. If I have five tracks, and only want to see one of them, that requires at least four clicks. Then switching to show all again is four more clicks. Imagine if you had to solo tracks in track view that way!
 
@Kev999 Funny, I just tried staff view this morning as a possible solution. It's much easier to see when, for example, I accidentally recorded two parts on the same track, and is going to be really useful, but for editing it's not that great. I can't change durations very easily, and I can't move notes across tracks. Still, it solves 30% of the issue.

Yes the problem is that clip (and midi) colors always follows track colors, if it is not default. You can't switch it off, as I know. It is a big software design mistake, one of those in GUI area. I wish that time will come, when leaks like this will start being fixed. It just about adding one line in the preferences...

Changing the clip foreground color (via Clip Properties Inspector) doesn't change the note color in PRV. This is a bug.
 
To hide all the other vocal tracks in PRV, click "Hide All Tracks" from the Tracks menu and then click inside the PRV Notes pane to bring up a pop-up listing tracks, from which you can choose a desired track to edit.

jkoseattle
My color needs are different from Track View and PRV. In Track View, I want sections to be colored the same (Vocals are all white, Strings are all red, etc.) but when I'm wreiting parts for a single section in PRV, then every track within the section needs to be a different color. 
 
@Bristol_Jonesy This is what I was referring to as being way too cumbersome to show only one track. If I have five tracks, and only want to see one of them, that requires at least four clicks. Then switching to show all again is four more clicks. Imagine if you had to solo tracks in track view that way!
 
@Kev999 Funny, I just tried staff view this morning as a possible solution. It's much easier to see when, for example, I accidentally recorded two parts on the same track, and is going to be really useful, but for editing it's not that great. I can't change durations very easily, and I can't move notes across tracks. Still, it solves 30% of the issue.

Hi Jim


Have you tried having each track on it's own PRV in the Multidock?
This way it's just one click to get to the one you want to work on.
 
To enable this, when you have one PRV view docked - right click it and choose "Lock Contents". Now, when you open up another track, the first one will stay there.
 

@Bristol_Jonesy Thanks for that, I didn't know I could lock windows like that, I'll try it out. But of course, this still doesn't solve the issue entirely. I should be able to see all the tracks (in different colors) in PRV, then basically visually "mute" and "solo" tracks as I need all in one window. I like the feature where I can lock but still see tracks, but again, it's all one at a time, ugh.
 
Another useful way to solve this would be a feature to "Hide all but active track" and "Lock all but active track". This way I can click around tracks all I want and never accidentally enter notes on the wrong track (which is SO EASY TO DO when all the tracks are the same frickin' color!)
 
As long as Sonar upgrades are all about new bells and whistles instead of what seem to be the most basic UI improvements, I have no interest in upgrading. Working in software, I know that no one wants to work on boring improvements to existing features, and the cherry assignments are for building new stuff. But someone over there needs to get these guys in shape. The product is so bloated with features whose usability is only marginally examined. There are "obvious" simple improvements I've been waiting for for a decade.

icontakt
Changing the clip foreground color (via Clip Properties Inspector) doesn't change the note color in PRV. This is a bug.

 
I do agree that it would be preferable for PRV to follow clip colour rather than track colour. But it's probably not a bug. In pre-X versions, track colour and clip colour were synonymous.

Since we're talking about colors, why is it that the default track color palette is so limited, and that they don't represent true colors, but are these fancy gradient versions of colors that are often hard to distinguish? I find myself going into the "more colors..." palette more often than not just to find a color that looks enough unlike the other colors that I can tell them apart.
 
Here's the thing: The velocity of a note in PRV affects the shade of the chosen color, and whether it's locked or selected, or whether a clip is muted in track view, which means that for any chosen color, there is actually a range of shades. Try opening two tracks in PRV that are two of those very close default red shades and look at notes with different velocities and I dare you to tell them apart, defeating even the workaround of coloring tracks differently! And then, one of the default colors is yellow, which, using the default PRV background of white and gray, makes that color basically unusable. I mean.... COME ON, Cakewalk!