Using Yahoo! Toolbar Apps
Apps are the buttons that are displayed on your Yahoo! Toolbar between the "Search" button and the "Settings" gear icon.
Apps give you direct access to web pages or previews of your favorite sites, right from your Yahoo! Toolbar. You can check for new email messages, find out what the current temperature is outside, consult your daily horoscope, or look for movie showtimes.
Click an App icon to open the App, or select the down arrow next to the App in your Yahoo! Toolbar to use the App or access its settings.