Adding background image to header on all pages using Custom CSS

Hello,

I am trying to add a background image to the header on all pages of my website. 

Is there a custom CSS to do this?

I am using the CROSBY theme.

thanks,

Tom

Hey Tom, do you have a link to your website I can take a look at?

Add to Home > Design > Custom CSS

.header-announcement-bar-wrapper {
    background-image: url(https://beaverhero.com/wp-content/uploads/2019/06/trees-3464777_640-min.jpg);
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
}