When reviewing a switching sheet, you can focus on a device in the Viewer window to better understand the conditions present in the area of the device. To focus the Viewer window on the device in a switching step, select a step on the Steps tab and then select the Focus button () on the Steps tab toolbar. The Viewer loads the appropriate map and focuses on the device. The Focus button can also be used to focus the viewer on a group of devices. To focus the Viewer window on multiple devices, highlight multiple steps with different devices and click the Focus button. The Viewer will load the appropriate maps and highlights each device in the viewer.