To make it quicker to view your page in a browser, Constructor provides you with a menu item View | External Preview... which saves the current document to a temporary file and opens it in a specified browser. Before you can use this feature, you must tell Constructor what browser you want to use. In the Settings window(Options | Settings...), go to the Programs tab. Click on the first Browse... button and select the Application file for the browser you want to use to open the file in. Click on OK twice, and then you can use the View | External Preview... menu item to preview your pages.