How to put smart slider below the header?

I am using the Astra theme. As well as a smart slider, elementor header, and footer plugin. So I have an issue with my website. That is I wanna put a smart slider below the header. As well as, I tried a lot to set the header to the above slider. But It doesn't work. Plz, help me to resolve this problem. >> How to put a smart slider below the header?