Add a layout block
In order to add a layout block, just drag it from the ”Contents” section onto your template. This is a similar process to the desktop version.
On the right side of the layout block, you will find a little flag that says ”MOBILE ONLY.” This handle indicates that this particular layout block will only be displayed if the recipient is reading your newsletter on a smartphone. Additionally, the layout block will not show when switching back to the desktop editing mode.
Search through the manual