Therefore you have to add a new template and a style for that template. Templates are located in the tpl folder of the plugin.
You can copy the dfl.html and you can edit the copied file.
Then add a new style file. Style files are located in styles folder of the plugin. The styles for the links are located in the styles/lp folder. Add a new style file here. You could copy the default_dfl.css and modify the copied one.
The name default_dfl.css is composed of the style name "default" and the styles is connected with the "dfl" template.
If you have a new template named myLink.html and you you want to create a new style with the name myStyle then name the new style file myStyle_myLink.css.
After that the new style is available in the plugin settings as an option in the link area of the settings page.