DemoHelper is a tool which helps in demonstrations, presentations or if you just need to explain someone something on your computer. DemoHelper is an annotation and screen zoom tool you can use for technical presentations that include application demonstrations. DemoHelper runs unobtrusively in the system tray and is activated by either customizable hotkeys or the context menu of the tray icon. You can draw on the screen to mark special areas, or you can zoom in on an area on the screen. Use cases include meetings where you have to explain something on the screen or teachers presenting lectures to students in computer classes.