In WebStarts, access your webpage in the editor mode and go to Edit → Edit HTML.
To edit the existing code located in the Body section of your page, select the View Source Code tab in the left panel and then edit the code provided as required and then click the OK button. To edit the Head section of your site, be it the Head of the entire website or that of just that page alone, select the appropriately labeled tabs located in the left panel and edit the code as required and then click the OK button.
The online form will be automatically displayed in the page editor. You can adjust the width and height of the widget, as well as its position, to make it look at its best on your webpage. Save your changes and there you have it! Form visitors can now submit your online form directly from your WebStarts webpage.