When you choose a slice of type No Image, you can enter text to be displayed in the slice area of the resulting web page. This can be plain text or text formatted with standard HTML tags. You can also select vertical and horizontal alignment options. For more information on specific HTML tags, see an HTML reference.
Photoshop does not display HTML text in the document window; you must use a web browser to preview the text. Be sure to preview HTML text in different browsers, with different browser settings, and on different operating systems to confirm that your text is displayed correctly on the web.