Image: HTML Code Editor <style> table { background-color: #CCFFFF; } td ... If you’re keen to learn more about HTML and CSS, then head over to TechRepublic Academy.

Open your website's stylesheet in Notepad or your code editor. At the top of the code, write a style rule setting the entire page and HTML body to 100 percent height:html, body { height: 100%; } ...

Open an HTML document that has an image and find the document's section. Paste the code shown below inside that section.This code creates a CSS class named stretchX.