This command (in the Window Menu)performs the same action as clicking the Preview Tab at the bottom of the document. For ASP and ASP.Net files - the first view is usually cached. Therefore, on subsequent views of the same page, even if you've changed the code in the document, you may need to refresh the screen in order to see your latest changes. This can be done in two different ways. The first way, is just as you normally can do in ID, right-click on the document and choose 'Refresh'. The second way is clicking the 'Refresh ' button on the Status bar (at the bottom of the ASP Express IDE.