Unable to see contact role contacts in emails other than primary? - In potentials / Deals

Unable to see contact role contacts in emails other than primary? - In potentials / Deals

I am unable to see the emails of any of the additional contacts added via contact role.  The video here shows that we can do this but the middle "Names" selection box is not showing up for me?  I have multiple contacts added via contact roles and the only emails I am able to see are the primary contact.

Please help!