Clicking Preview will display your page in an iframe of the popup preview window. If you are working on a border area, the home page or the first page that your border area is used on will be used for the preview content area. Note: Your browser may block the preview popup. If it does, you will need to "approve popups for this page". The preview popup can be re-sized with your mouse to a larger window if needed. The button at the top of the preview popup is handy for refreshing the preview with the latest changes without having to close and reopen the preview popup. Click the button to close the preview window.