Can't find bInvertMiddleMousePan=False

I wish to change this ini setting to True permanantly, but I can’t find it an any .ini file. Is it Exposed?
This setting allows panning to behave like Maya, and not the inverse.

It is referenced in the docs here:

Actually… I just added bInvertMiddleMousePan=False to ‘BaseEditorPerProjectUserSettings.ini’ and the default mouse pan is similar to Maya.