Beginner question here. So far we have not been able to identify a way for team members to add comments to notes/emails etc. of a deal. 

If someone posts a note, or an email comes in, typically as we used Highrise, we could comment on it and start internally a communication thread. Does this function exist in Pipedrive, and if so, where can I find it?

Thanks very much for any insight. 

Willem Jan.