I have the "Z3TA+ 2 User Guide.pdf".
 
When I hit F1 either in the main GUI or in the 'about' screen, a window opens with title "HTML Help" but the window is blank.
 
I have found no .chm file anywhere on my system, and have found no online references to a Z3TA+2 help file.
 
 

I have used the PDF file when I need help.  If you want to access it more easily, there's a command for it under options button.  (Top right of Z3ta+ 2 UI.)  Also there's a quick signal-flow map available by clicking on the "Cakewalk Z3ta+2" nameplate.
 
Hope that helps.

 
Thanks ricoskyl.  I didn't know about the link to the manual in the options menu.  I'm mostly curious since pressing F1 actually opens a Help window, just as in Sonar and various instruments (DimPro, Rapture, Psyn, etc...), but the window is empty.  As if z3ta+2 expects there to be a .chm file somewhere but doesn't find it.

Good point.  Maybe you should write it up as a feature request.  F1 seems like a natural way to access those resources and it's consistent with other CW plugs.