My main navigation on several lines.

Good morning,
I am redoing a Wordpress site with the Jannah News theme.
I would like to know how to make my menu on several lines.
Thanks in advance.

For theme support, the best way is to contact the theme author, either via the item’s support tab page or via the item’s comment section.

Check this help page: https://help.market.envato.com/hc/en-us/articles/203039054-How-to-contact-an-author