Executing the Save Configuration command from the Equation EditorFile menu writes the file apteqn.cf on Windows or .apteqn.cf on UNIX in your application data directory. The application data directory is the directory where your operating system stores user-specific data. This is usually C:\Document and Settings\user_name\Application Data\PTC\Arbortext\Editor.

You can change system defaults by creating a apteqn.cf file with the desired defaults and placing it in the custom\lib subdirectory of Arbortext-path.