I missed up the default keyboard shortcuts. How to restore them to factory default? I tried Ctrl+Shift trick but as you can see in the screenshot it did not restore the default keyboard shortcuts for layouts!
If I remembered correctly, just go here and erase the keyboard.ini data.
The next time as VEGAS starts, it creates automatically a default new one.
Thank you .. that solved the problem. However why Vegas Pro make it so difficult to restore the default keyboard shortcuts? They should make it much easier to do by clicking a button inside the program itself.