Stacking Elements in Layers Using z-index Property

Usually HTML pages are considered two-dimensional, because text, images and other elements are arranged on the page without overlapping. However, in addition to their horizontal and vertical positions, boxes can be stacked along the z-axis as well i.e. one on top of the other by using the CSS z-index property. This property specifies the stack level of a box whose position value is one of absolutefixed, or relative.

The z-axis position of each layer is expressed as an integer representing the stacking order for rendering. An element with a larger z-index overlaps an element with a lower one.

z-index property can help you to create more complex webpage layouts. Following is the example which shows how to create layers in CSS.


•	.box {
•	    position: absolute;
•	    left: 10px;
•	    top: 20px;
•	    z-index: 2;
•	}
Categories: CSS