Box-Template is designed for users that don't have technical or coding skills. However, we understand that there are users who may require some custom coding to further design their templates to fit their needs. The Code Box is designed to allow such customization. You can use HTML code on your template using this meta box to add any HTML elements you need. Most users use this to add youtube videos to their template.
To add a Code box, click the "Elements" tab and find the "Code Box" widget from the list. Drag and drop the widget on the spot where you wish to place the icon. You can click the edit button to open the editor modal window and start putting in your HTML code.