All Panda3D programs read their configuration options from a central configuration file: /etc/Config.prc
You can view this file to see what values are assigned to the various configuration variables that is used by any Panda3D program. A list of the possible configuration variables, their description and default values is here. With superuser permissions, this configuration file can be edited to change the parameters used by Panda3D programs.
Tried with: Panda3D 1.9 and Ubuntu 12.04 LTS