Configure any mobile viewports you want to make available when creating your experiences.
This video includes information about setting up mobile viewports in the account preferences, beginning at 4:40 in the video.
To change the configuration of an existing mobile viewport, select that viewport, then click the Edit (pencil) icon.
Give your mobile viewport a descriptive name that is easy to recognize. The name can be up to 36 characters long.
The width can be between 150 and 968 pixels. The height can be between 150 and 1280 pixels.
If you use the Enhanced Experience Composer and choose an operating system, Target emulates that device when you view the page. If, for example, there is a different look and feel for Android than iOS on your responsive site, Target mimics that behavior.