Hi @DanUK1, thanks for clarifying how your design is working, that is fine to keep those elements with their current visibility, that was mainly a cleanup suggestion. Regarding the menu, At the moment, that is the default behavior for the navbar drop down type, the mobile navmenu opens under the mobile icon element. It is built in to the widget that way.
There are a couple of other menu types, Over Right and Over Left that you can also try, that do something more similar to I think what you are looking for.
On the slider issue, select your Slider element and set the position to relative, and set the z-index to 0. This will force the slider elements below the nav’s.
I hope this helps, try that and see if you the Over Right or Over Left menu types work for you.
Cheers, Dave