Hello PR,
Thank you for choosing XStore as your WooCommerce WordPress theme.
1/ It is used while creating one-page menu https://xstore.helpscoutdocs.com/article/88-one-page-menu
2, 3/ Please read this article – https://xstore.helpscoutdocs.com/article/27-mega-menu
Different design means different menu displays.
4, 5/ These options work for the design – Mega menu, and means width and height of it.
6-10/ Please check the example from this topic – https://www.8theme.com/topic/how-to-add-icon-next-to-text-on-main-menu/
We hope this information is helpful.
Kind Regards,
8theme team