var instance = new Vintasoft.Imaging.UI.Panels.WebUiThumbnailViewerPanelJS(settings, stateButton);

var value; // Type: boolean
value = instance.get_CanSetCustomViewRotationUsingContextMenu();

function get_CanSetCustomViewRotationUsingContextMenu() : boolean;

True - the thumbnail viewer allows to rotate thumbnail view using context menu; False - the thumbnail viewer does not allow to rotate thumbnail view using context menu. Default value is False.