To Preview the Open Script

Select the Animator Preview tool ( Visualization > Animate > Control ).

For convenience, this tool may be docked at the top or bottom of the application window.
In the Animator Preview tool settings, click the General Settings icon and in the Animation Settings dialog, adjust the settings as required.
From the view option menu select the view in which you want the preview displayed.
Click the Play button.
Previewing begins. To stop the preview before its conclusion, click the Pause button, or enter a Reset.

Previewing an open script