After you have clicked to add a spacing element, you will see that a new space appears looking like these white stripes.
You can add as many spacing elements as needed to give more spacing to a certain area of your section. The spacing is especially useful when you want an item to appear on the bottom or top of a section.
Please note that the stripes are only visible to you and not to the end-user
With this icon, you can drag your spacer element inside your section.
With the duplicate icon, you are able to copy your spacer element inside your section.
By clicking the trash spacer you are able to delete your icon element.