Hi Miguel Figueroa,
Add Static Image to the page and add custom class in the styling properties Now create a class with the same name and add the code similar to the below code
.custombackground-image{
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-size: cover;
background-position: center;
background-repeat: no-repeat;
background-attachment: fixed;
}
Please adjust the properties as for the requirements.