Not able to use the "Sticky Navbar"

Design help Layout & Design
1

Hey guys,

I’m pretty new to this tool and this is my very first website. I’m stuck with the Sticky Navbar setting and am not able to use it. Can anyone please help me?

Read only link: https://preview.webflow.com/preview/vaibhav-portfolio?utm_medium=preview_link&utm_source=designer&utm_content=vaibhav-portfolio&preview=3c379c22c75a1399b4b82b1d5fd5bc97&workflow=preview

Thanks!