Use preview mode in the landing page editor
Describes the landing page editor preview mode.
In the landing page editor, you can use the preview mode to see what your landing page looks like on mobile devices, tablets, or desktops before you send it. This can help you to check your landing page's content and design when you are adding more items to customize it. You can see see the result of your changes as you make them.
To preview a landing page design:
On the top menu of the editor, click Preview. The editor switches to preview mode.
Click the preview icon that corresponds to the device you want to preview your design on. You can choose mobile , tablet , or desktop preview.
To return to editing your design, on the top menu, click Edit. The editor switches back to edit mode.