How do I prevent students from advancing to the next screen until audio is done?

Hi all. In Captivate 2017, how do I prevent students from clicking next until the audio is complete?  I am working with a client who has their own custom playbar and I can’t figure out how I can prevent students from advancing until the audio is done? Thank you.

Changing the font in slide notes

How do I go about changing the font and font size in my slide notes in Captivate 2017.