Thank you for reaching out to the Community. That is a great question! The third generation editor does have a bit of a different layout. You can click here for a tutorial on getting started with Action Blocks.
To add a Join My List button, you will need to get the URL link to your sign up form under the Landing Pages and More section and copying the Form URL link. Once you have the link copied, you can link the form in your email campaign.
Unfortunately at this time we do not have a Forward to Friend option in our third generation editor. I will certainly submit your feedback to our developers on your behalf and that you would like this feature to be available.
In the meantime, if you have any further questions please feel free to reach out to us here. We are always happy to assist you in any way we can!
... View more