I followed this article to create a custom email template: https://doc.sitecore.com/developers/exm/90/email-experience-manager/en/walkthrough--building-a-custom-message-template.html
However, it's not showing up in the EXM dialog.
Any suggestions/insights?
Sitecore version 9.2
,
EXM version 3.5.1 rev. 171103