The Preview URL element ensures your contacts can view your emails in the intended format. It's added by default to all blank email templates.
For existing templates, you can add the Preview URL element from the Elements menu.
Once added, select the element and click the hyperlink icon to customise it. A modal will open where you can enter the URL the text should redirect to, modify the display text, add a title, and choose whether the link opens in a new tab.
You can also add custom links by selecting them from your custom values section.
Click Save when you're happy with your settings.
Edit
Clicking the element also opens its settings, where you can choose a background colour and adjust the margin and padding. These options make it easier to create eye-catching, customised email designs.
Visibility
Switch to the Visibility section to select which devices the element appears on, and to personalise emails based on your contacts' custom field data. For more on the Conditional Sending feature, see the How to Use Conditional Elements in Email Builder article.
Preview the template and send yourself a test email to confirm everything works as expected. When opened, the email should look exactly as it does in the email builder.
That's all there is to it. You can now make the most of your email campaigns, giving your customers the best possible experience.