Creo Interactive Surface Design (Style) > Creo Integration > To Edit the Definition of Style Features
  
To Edit the Definition of Style Features
1. In the Model Tree, select the Style feature.
2. Perform one of these actions:
◦ Click Model > Operations > Edit Definition.
◦ Right-click and choose Edit Definition.
Style features are superfeatures, so clicking Edit Definition allows you to add as well as edit elements.
 
* You cannot save your model while you are inside Style. It is good practice to create some curves and surfaces, exit Style, save your model, and then use Edit Definition to add more elements.