The ribbon is dynamic, meaning that the appearance of commands on the ribbon changes as the width of the ribbon changes. A command might be displayed on the ribbon in the form of a large button, a small button, a small labeled button, or a list entry. As the width of the ribbon decreases, the size, shape, and presence of buttons on the ribbon adapt to the available space. For example, when sufficient horizontal space is available, the buttons on the Review tab of the Word program window are spread out and you’re able to see more of the commands available in each group.