A master stylesheet should be the first stylesheet you call in all your documents. You use a master stylesheet to clear out the default browser settings that can cause problems in cross-browser Web design. Once you've cleared out the styles with a master stylesheet, your design starts from the same place in all the browsers - like a clean canvas for painting. Global Defaults Your master stylesheet should start by zeroing out the margins, paddings, and borders on the page. Some Web browsers default the body of the document to 1 or 2 pixels indented from the browser pane edges. This makes sure that they all display the same: html, body { margin: 0px; padding: 0px; border: 0px; } You also want to make the font consistent. Make sure you use font-family names that are standard on both Macintosh and Windows computers. Be sure to also set the font size to 100% or 1em, so that your page is accessible, but the size is still consistent. And be sure to include the line-he