creo4 config.pro option documentation for: WEB_BROWSER_IN_SEPARATE_WINDOW 
web_browser_in_separate_window
yes
, no
*
Specifies whether to undock the Creo
browser and display the browser as a separate window.
yes
- Undocks or detaches the Creo
browser that is embedded in the Creo
window and relocates it to a separate standalone window as an undocked browser.
no
- Does not undock or detach the Creo
browser. The Creo
browser remains docked to the Creo
window. This is the default.