How do I use WASD for Pan instead of arrow keys

Hello, 

I was wondering if there was a way that I could change the default Pan settings to use WASD instead of arrow keys? I have looked into the "Settings -> Customize -> Keyboard" options to see if I could change it but that was but was unsuccessful. I use none of the other shortcuts that are bound to those keys so I was hoping I could have WASD always on pan, moving the screen in the assumed directions.

Thank you!