I figured out the answer myself.
You can view the User Options(that are the User created shortcuts) by pressing F16 on ‘Work with Members Using PDM’ screen. The screen that appears after pressing F16 displays all the existing shortcuts.
One thing to remember:
These user-defined PDM options are stored in a file on the system. Multiple copies of this file can exist, each one in a different library. The ones you are seeing may not be the same ones that someone else sees.
The default file name for storing these is QAUOOPT, and the default library for this file is QGPL. But copies of this file (possibly with different names) can exist in almost any other library on the system.