How to create overlay css

How do I make an overlay in CSS?

One of the ways of creating an overlay is by absolutely positioning an HTML element on the page. We create <div> element in the markup then position it absolutely with the position property. After it, we give the <div> high z-index value to make it on top of all other elements on the page with the z-index property.

What is overlay property in CSS?

overlay element in the markup, but instead of positioning the overlay absolutely, you give it a fixed position, and a full width and height to cover the entire viewport. Normally, when using fixed position, you don’t have to worry about where to put the overlay div in the markup.

How do you overlay pictures?

How do I make an overlay?