The "Twitter Feed Single fade in and out" Twitter widget is designed for a smaller panel where only one Tweet will be visible at a time.
You can specify the account that you wish to view, for example CNN or BBCNews, and the enter a title that will appear at the top of the feed widget.
Enter a background color for more contrast and specify a font size that will be visible in your Tweet panel. You can also adjust the height of the Tweet window and also the width of the Tweet panel. Always make this smaller than the overall panel size. You can also enter duration and optionally, schedule this slide.