The first tab that you’re going to learn about is the General tab. Like most tabs, this tab contains several drop-down lists that allow you to specify enumerated property values, for example, whether the ButtonMode property should use an Image, basic HTML button, TwoStateImage, or ThreeStateImage (each one a value from the ButtonMode enumeration).
Key feature of the General tab are the font, formatting and special character lists that control the group of choices that appear in the toolbar’s drop-down lists.
Select the "Font Style" option from the list box and click the Edit List button. In the dialog box shown below, add a user-defined style for yourself using CSS-style rules. For example, you can add a user-defined CSS-style named "strikeout" based on the following style properties:
"color: red; text-decoration: line-through;"
See the screenshot below for the added strikeout style.
Click OK when you finish editing these lists and then click Apply on the Quick Design to commit all changes. Now verify your changes by pressing Ctrl-F5 to run the Web application. If your WebHtmlEditor’s™ toolbar contains the FontStyle drop-down list enter some text, and try selecting the "strikeout" style from the drop-down list, and continue entering more text. Observe that the new text assumes the style as you have defined it in the Font Styles list.