Closed Captioning on SAP Enable Now

Hello, I am Irina Pelagie from France. We are currently discovering SAP Enable Now in our company and I am creating learning content for intern services with Producer. I am on a project for a elearning module and would like to know if the CC (Closed Captioning) option was available ? When I am playing a Book Project it does not show any button to activate CC and I can not find any way to insert optional sub titles for my voice overs other than the Text to speech feature (which is not optional). Did I missed a setting for that ?

Thank you for your help !

Take care.

Irina