CSS background-size property - W3Schools
www.w3schools.com › csSref › css3_pr_background-sizeDefinition and Usage. The background-size property specifies the size of the background images.. There are four different syntaxes you can use with this property: the keyword syntax ("auto", "cover" and "contain"), the one-value syntax (sets the width of the image (height becomes "auto"), the two-value syntax (first value: width of the image, second value: height), and the multiple background ...