How to Edit Text and Images                    

You can use the mouse and keyboard to manipulate text or image areas on CPDFViewer as in Microsoft Word, if you want to copy, paste, cut, or delete text or images, you can using the CPDFViewer's PDFEditCommandHandler event. The following code will show you how to do this.

viewer.PDFEditCommandHandler += Viewer_PDFEditCommandHandler;
private void Viewer_PDFEditCommandHandler(object sender, TextEditCommand e)
{
    e.Handle = true;
    e.PopupMenu = new ContextMenu();
    e.PopupMenu.Items.Add(new MenuItem() { Header = "Copy", Command = ApplicationCommands.Copy, CommandTarget = (UIElement)sender });
    e.PopupMenu.Items.Add(new MenuItem() { Header = "Cut", Command = ApplicationCommands.Cut, CommandTarget = (UIElement)sender });
    e.PopupMenu.Items.Add(new MenuItem() { Header = "Paste", Command = ApplicationCommands.Paste, CommandTarget = (UIElement)sender });
    e.PopupMenu.Items.Add(new MenuItem() { Header = "Delete", Command = ApplicationCommands.Delete, CommandTarget = (UIElement)sender });
    e.PopupMenu.Items.Add(new MenuItem() { Header = "Select All", Command = ApplicationCommands.SelectAll, CommandTarget = (UIElement)sender });
}