In the dashboard, hover over the page, post, or email you'd like to edit the template for, then click Edit.
Click the Settings tab at the top of the content editor, then scroll down and click Advanced Options.
To edit the template, in the Template section, click Edit this template.
If the template is being used by another piece of content, a dialog box will appear. To apply your edits to all pages, posts, or emails using the template, click Edit this template. To only edit this piece of content's template, click Clone & edit new template.
The template will open the design manager in a new tab, and you can then edit your template as needed.
When you're done making changes to your template, click Publish changes in the top right of the design manager. The changes will then be applied to the content using this template.
To swap out your template, click Use different template.
In the dialog box, select the template you want to use for the page and click Select this template.
The page or email will update to the new template. Click the Content tab at the top of the editor to edit the page or email with its new template.
Please note: if you cannot find a template, it's possible that the template is not compatible with the current template for this page. Learn more about which template types can be swapped with one another.