Hey Patric,
We’re sorry for the confusion. First off, please stay away from using the generated classes like e1159-11
. It is for the builder’s use only and it will change if you’re going to rearranged the elements. I’ll remind @mldarshana about this.
You should apply a custom class to the element itself or at least the element’s parent. In your case, you will need to apply it to the menu item. You can do that by following this guide.

If you followed that class in my screenshot, the code you’ll need to add in your Header CSS is this:
.mid .x-dropdown {
top: 50%;
transform: translateY(-50%);
bottom: auto;
}
If instructions are followed correctly, your submenu will be positioned in the center like this.

Just note that it will remained position in the middle of its parent menu.
Hope that helps.