WebDesign provides many HTML wizards that can help generate HTML code to perform certain tasks. These HTML wizards can also speed up editing by reducing the amount of typing that you must do. However, if you find that WebDesign is lacking in any area then it is possible for you to develop your own wizards to generate code for HTML as well as any other language such as javascript, CSS, ASP, PHP etc...
To create additional plug-ins, download WebDesign's Plugin Maker which offers an easy to use visual development environment for creating plug-ins.