Add a group of elements to the e-mail by moving the "Group" instrument to the desired position.
A group of four elements will appear. You can add elements to the group.
To remove the group from the e-mail, click on the "Remove item" icon above the group.
A confirmation will appear.
Click on the "Yes" button to confirm it.
To move the group to a different position, click on the "Move object" icon, and hold while dragging the image on the desired position. Then release.
To duplicate a group, click on the "Duplicate item" icon.