Skins
The masterpage feature of ASP.NET makes it easy to change the look and feel of your site by changing just one page - the .master file. By editing this file or uploading your own - you can change the position ofthe header, navigation, panels and others.You can change colors or add more elements from your pages. You can change the dimensions of your site - make it wider, narrower or make it occupy the whole screen. No need to change any other page - just the master page.