I'm happy that this has become easy.
Customize Keyboard Shortcuts
http://download.parallels.com/desktop/v9/ga/docs/pt_BR/Parallels Desktop User's Guide/32884.htm
Pallalels Desktop Preferences
-> Shortcuts -> Choose your virtual machine -> Profile: OSX
Change Cmd+H -> Anything else
By the way, "Menu Title" is now "Hide Windows".
The key bind can be changed and either be checked or unchecked at:
Pallalels Desktop Preferences
-> Shortcuts -> Application Shortcuts
Last edited: Jan 24, 2015