A floating header / menu

Hi, I use the Adonis theme. Is there a way to have the logo float as the user scrolls down? I'm looking to see if there is anyway to surface a logo without it being dart in the center of the featured image. Basically, what I'm trying to ask is, is there any way to have the logo displayed on the website in a small, inconspicuous fashion, either fixed or floating on the top header.