The PageView control contains the UpdateMode property, which is set to Manual by default and can be set to True to enable the auto-update functionality. If the UpdateMode property is set to Automatic, you do not need to call the Update method in your code when changing display settings or annotations. The PageView control will automatically display any changes that are made to display settings or annotations. It is still necessary to call Update manually when modifying or processing the PageView.Display.Page because changes in ImGearPage do not currently cause an automatic update.