Change Line Item Design (not only the width!)

Hello,

I could like to set tue customfields below the name/text of the line. How can I change this?

I understand the system explained at https://www.youtube.com/watch?v=pXQ6jgiHodc but I would like to do more.

Thanks,
Michael

It should be possible with a custom design, this company provides services to help.

https://boldcompass.com/customize-invoice-ninja/