creo4 config.pro option documentation for: PRO_EDITOR_COMMAND

pro_editor_command
<command>
Enables an editor other than the system editor when the optional editor has been specified as the value for the option relation_file_editor
.
The command specified will be executed as it is typed in the config.pro
file. If the command does not open a new window, you can start the editor in the system window used to start Creo Parametric
.