We need to switch the content in many of our emails from one template into another. As far as we're concerned, the only way to accomplish this is to create a new email with the new template, then manually switch the content from each old email into each new email. My colleague, however, thinks there might be a way to do this more efficiently, wherein the code of the new template can be placed into the code for the old template. But we also don't wanna mess up each email using the old template.
Does anyone have any insights/suggestions for this?