Include Image on multiple sites with the ability to easily change it later

Hey,

I want an image to be used as a button on multiple pages of my website. I got the image button working by uploading the image to squarespace and then getting the URL and implementing the hole thing manually using the HTML <img> element inside an <a href> element in a Code block finishing it of with some CSS Styling.

I was wondering if there was a way to change the image later down the line if I ever decide to redesign my button without going through each and every single page and changing the image src URL.

Thanks in advance.

Oh wait, I think I figured it out. You can use the content property in CSS in order to insert images. See here.