Editing your email's subject line and preview text
Your email's subject line and preview text are the core elements of your "envelope content." Writing compelling envelope content that resonates with your audience is critical to maximizing subscriber engagement. Writing and editing subject lines and preview text is easy and straightforward in Litmus Builder.
Editing the email subject line
Your subject line is editable from the Builder tab of your email. The subject line is displayed above your email content in the preview pane.
Using Builder code editor
From the code editor, if your subject line is empty, simply click Add to write your subject line. Then click Save or hit Enter on your keyboard to save the new subject line.
To edit a subject line, click on the subject line or the Edit option to the right. Again, click Save or hit Enter on your keyboard to save your changes.
✏️ Note: The subject line field allows up to 100 characters and will advise you when your subject line exceeds the 50-character threshold—a good rule of thumb for optimizing engagement.
Using Visual Editor
In Visual Editor, you will see an Add option when your subject line is empty. Click this to enter a new subject line.
To edit an existing subject line, click on the subject line and then make your changes in the left-hand editor pane. Your changes are auto-saved.
✏️ Note: The subject line field allows up to 100 characters and will advise you when your subject line exceeds the 50-character threshold—a good rule of thumb for optimizing engagement.
Editing preview text
Preview text is editable from the Builder tab of your email. Preview text is displayed along with the subject line above your email content in the preview pane.
Using Builder code editor
Editing preview text in the code editor is done from the left-side code editor panel. The preview pane will show your email's preview text update in real time as you make code changes.
Looking for preview text code to use in your email? Check out this post from our blog to get the code.
Using Visual Editor
In Visual Editor, you will see an Add option when your preview text is empty. Click this to enter new preview text.
To edit existing preview text, click on the preview text in the preview pane and then make your changes in the left-hand editor pane.
✏️ Note: The preview text field allows up to 200 characters and will advise you when your subject line exceeds the 90-character threshold—a good rule of thumb for optimizing engagement.
Updating subject line and preview text in Proof and Previews & QA
When you've made changes to your subject line and preview text and want to send those updates to Litmus Proof or Litmus Test, click the green Update Proof & Previews tabs button in the upper right.
For more information on updating Proof and tests from Builder, read this article.
