Use Open System Window to open a system window. This command is not available by default on the ribbon. For details on how to access it refer About Commands Not in the Ribbon

You can open a system window (called a command prompt window, in Windows) directly from within Creo Parametric. Use a command-line editor to edit a configuration file or to carry out other operating-system commands. You can launch the Pro/Table by typing "%PROTAB%" in the system window.

You must exit the system window before you can continue using other Creo Parametric functions.