Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. Its most common application is to style web pages written in HTML ..

Include a CSS style parameter in your HR tag to modify the default color to black. Use an HTML or text editor to open the HTML page in which you want the line to appear. Type the following code ...

If you want the header aligned to one side, add the following line ... add it to the CSS file, but ensure to use the same "id" name that is used within the HTML. The HTML Code for Nested Lists.