I think it used to do this, but all of a sudden it comes up minimized 
when clicked, it comes up half size, then I have to click it again to make it full size...
Anybody know how to change this? Thanks...very time consuming

If you undock the PRV form the Multidock, maximise it, you'll find that hitting D repeatedly will toggle between Track view and a maximised PRV.
 
There may be other solutions but this does work

Thanks...I give it a shot

I find if you just maximize the dock (SHIFT+D) you can still have access to the control bar and have the prv in large scale. you only gain an inch of real estate. but BJ has a good idea there. that's what I do when I have large chords that need an extra inch. Speaking of needing an extra inch... 
when you work in the PRV your 2 favorite shortcuts should be SHIFT+D and D.
get to know them, embrace them, love them as they were your own.

Yea...another inch couldn't hurt LOL
Thanks!

dannyjmusic: You might be interested in this [very long] thread about PRV size: (Sorry, link to forum post was removed. Maybe I'm too new here? Anyway, just do a forum search on PRV size.)
 
Apparently some of us have the problem with PRV size, some not. Some of the most-mentioned fixes include (1) checking for locked screensets, and (2) undocking and floating the PRV window.

Cool...will do 

One word Screensets.

Yes John.
 
Once you've configured things the way you want, copy it to an unused screenset and lock it