How can I duplicate a divider accurately on my store edit page?

Hello, i would like more Dividers

I tried duplicating one i already have on my store edit page, but although it creates one - its different size and is white or transparent. basically not duplicating it exactly to the previous one.

i also went to edit code section, found the divider, and created another section with the same code but it didnt seem to show up anywhere

yes please