I am using Vegas Studio 10 Platinum. I read that it was possible to assign a hotkey to the EPC window for ease of access. The direction was to click on Options and from there to 'Customise Keyboard'. However, I do not get a 'Customise Keyboard' option - the only customising option offered is to 'Customise Toolbar'. Can anyone point me in the right direction?
It means that Movie Studio does not have the Customize Keyboard option, as you'd noted yourself.
I don't know if there are other means to do it. You might test something like Keypad Controller for Sony Movie Studio. I haven't tested it.