This is a post by Natasha Reaves on the Rand 3D Site.
In Creo Parametric, the configuration file options control the design environment for parts and assemblies. This means that the configuration file, known as the config.pro file, is the master control file for the design environment.
The config.pro file can be accessed by selecting the File tab > Options > Configuration Editor.
An example of the Creo Parametric Options dialog box is shown here.