Creo Interactive Surface Design (Style) > Style Parameters > About Parameters in Style
  
About Parameters in Style
You can modify parameters in Style features outside the Style feature.
You can make the following types of Style parameters visible outside Style:
Tangent length, angle, and elevation angle
Offset plane value for planar curves
Soft point options: parameter, length, length ratio, and offset from plane
Internal datum parameters such as translation offset and angular offset