How to make Max Mega menu vertical?

Question

Cataloging

I am making a website for a store on Wordpress (Storefront theme), I need a separate drop-down catalog menu in the left sidebar, I decided to try to insert Max Mega Menu there through widgets, it worked, but I didn’t find information anywhere on how to make it vertical in one crown, it is displayed like this:

If someone can suggest a plugin for a good vertical menu for the sidebar, I will also be grateful, thanks in advance to all who answered :)

Answer 1

plugin settings: menu themes - custom design
paste CSS code and don't forget to press ctrl + f5
#mega-menu-wrap-max_mega_menu_1 #mega-menu-max_mega_menu_1 > li.mega-menu-item{
display: block !important;
}