All you need to do is choose the GIF from your hard drive. You can also specify the size of your animated GIF (note: the default size will be 450×450 pixels.) There is also a text field to add some alternative text if you’d like.
Remember to quit EverWeb before launching the widget. When you launch the widget, you will receive a message saying ‘Your widget has been installed’. You can then launch your website project and look at the widgets tab and see the newly installed widget.