creo4 config.pro option documentation for: TOOL_PATH_PREVIEW_DEFAULT 
tool_path_preview_default
on
, off
, auto
*
Controls whether the tool path preview is displayed by default when creating a new step or editing an existing one.
on
- Displays the tool path preview.
off
- Does not display the tool path preview.
auto
- Displays the tool path preview for certain tool paths.