How do I make my Dreaweaver designed website automatically adjust its size etc to different resolutions?

How do I make my Dreaweaver designed website automatically adjust its size etc to different resolutions? I have built it on a laptop set at 1280 by 760. What do I have to do so it appears okay in other resolutions / screen size?How do I make my Dreaweaver designed website automatically adjust its size etc to different resolutions?Use percentage sizing instead of absolute widths etc.