Add a short CSS class to an HTML Web page to use animated and stationary GIF images as the page's background. Open an HTML document and find the document's head section.

Cascading Style Sheets (CSS) give Web developers precise control over a page’s typography and layout. One secret weapon of CSS-based designs is the background property, which adds images and ...

Using custom CSS, you can add a colored background to your posts without editing your posts in other ways and without changing the background of the rest of your blog's body. Log in to Tumblr and ...