When I open mailings we send in gmail, it looks like gmail has starting hiding portions of the email based on content segments in the Emma design. Is there a way to prevent this? I don't want recipients missing essential elements of the email.
Your recipients would not be seeing those ellipses and would be seeing the full message on send.
What you're seeing there is gmail assuming that you've already seen parts of your mailing, likely from a test send, so it truncates it down to show you only the parts of the content that have changed since the last time you opened a version of that mailing.
I get what they're doing, but sometimes they can be a little TOO helpful with their assumptions. :)
Let me know if you have any additional questions on that!