It lets the browser know where to insert a line break if needed. All lines of text are centered between the current left and right margins. To include a graphic image you first need an image file. Create your own image using a paint or draw program, or scan an existing image. Images must be in either .GIF or .JPG formats.
Image files are large compared with text files.
The image also takes longer to load than text files. The image size is not calculated. By default, the horizontal rule is 3D, and is across the entire document window. There are many images available which can replace the horizontal rule. Unlike the horizontal rule, the image will not be resized when the document window is resized.