creo4 config.pro option documentation for: SIM_DISPLAY_BEAMS 
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sim_display_beams
Category: Creo Simulate
Description: Toggle display of beam icons.
Values: yes, no
Default Values:
spec_driven
, user_driven
*
Specify the piping design method for the piping project.
non_spec_driven
- Activates the Non Specification-Driven piping design mode.
spec_driven
- Activates the Specification-Driven piping design mode.
user_driven
- Activates the User-Driven piping design mode. This mode allows you to switch between Specification-Driven and Non Specification-Driven piping design modes and convert existing assemblies at any time in the design process.