Please note: This helpcenter post describes how to proceed with our old Classic Editor for creating newsletters. The Classic Editor is no longer technically developed.
We recommend creating your emails in our new Newsletter Editor from now on. It is continuously developed, much easier to use and it offers lots of valuable and handy features.
If you want to use custom templates in the classic editor you need to enter template tags into your template file. Only if these tags are present you can save and edit templates. You will find further information on template tags in the article on our template technology.
So, if you cannot select your custom template under [Templates] in the classic editor you have the additional option to upload the template to the newsletter, source code or HTML-editor and work with it.