The WinForms PDF Viewer has several types of popup menus the user can invoke for bookmark options, bookmark tree, page content, a thumbnail, and thumbnail options.
This example shows how to add a new item, hide the popup menu for the bookmark tree, and remove specific items from the page content popup menu.
To customize items of the PDF Viewer's popup menu, handle the PdfViewer.PopupMenuShowing event. This event fires every time a user opens a popup menu in the PDF Viewer.
Each popup menu type has a unique set of bar items that are located in the bar item link collection. To access a bar item link collection, check the PdfPopupMenuShowingEventArgs.PopupMenuKind property value to determine the menu type and use the PdfPopupMenuShowingEventArgs.ItemLinks property.
To hide a popup menu, clear all items from the bar item link collection. To remove an item from the popup menu, find the item by its command ID and then remove it.
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