You cannot edit an E-Mail Template in the Design Tab.
Reproducing the Issue
- Go to Sales Campaign Work center.
- Select the Content view.
- Open an Content.
- Go to Design Tab and click in edit button.
You will notice that editable section is not appearing to edit the template.
The Enhanced Marketing Functionalities is not scoped in business configuration.
- Go to Business Configuration Work Center.
- Go to the Implementation projects view.
- Click in Edit Project Scope button
- Go to Scoping Tab
- In Scoping Element Select Sales Campaign and then mark the check box for Enhanced Marketing Functionalities.
- Click in next and finalize your changes.
You will able to edit the template.
KBA , LOD-LE-MKT , Marketing , How To