Currently marketing emails can be previewed as the recipient by adding email= utm to the preview link url. Is there any way to do that with custom objects (like custom_object_name=)?
Hi @MGoswick2,
It’s currently not possible to view custom objects in the preview mode for marketing emails. This is a great suggestion though 
I would highly recommend you to please post this product suggestion at our ideas forum.
Our product team, who monitors the forum regularly, can read your specific use case and understand why this would be a useful functionality or change. It also helps other customers facing the same issue to advocate for its implementation on your behalf by upvoting on the thread as well.
Thank you,
Kristen
THANK YOU SO MUCH FOR THE PARAMETER “email=” This just saved my hide!