How do I switch the template for an existing email?

Karen,

So you want to switch templates or change the template? Generally you cannot change an email afterwards, only during the clone or creation.

If you want to edit the template:
There are some threads on this already. The best thing to do is NOT do this. There is still a strong risk of causing the blank email effect.

Anytime you adjust a Template, it forces emails (or pages) which rely on that Template into draft mode. If you approve the draft first, then you will lose your entire email.

https://community.marketo.com/MarketoArticle?id=kA050000000KzX4&src=comm

https://community.marketo.com/MarketoDiscussionDetail?id=90650000000PV2NAAW

I want to SWITCH the template.... is that possible?

You cannot switch it.  You can create a new email based on the template you wish to swithch to and then copy the copy from the old email to the new email. 

This is an Idea that has been suggested and voted on strongly by the Community (https://community.marketo.com/MarketoIdeaDetail?id=08750000000Hw6LAAS) and liked as a future enhacement by Marketo, but it is complicated, especially if the old template and the new template are quite different (e.g.  no columns to 2 columns).  Please vote for this Idea.

This was an idea submitted 2 years ago!! I just hit this issue. I need to create an email from the template from scratch and copy/paste the copy? For real????