public override void DidChangeMode(PSPDFAnnotationToolbar annotationToolbar, PSPDFAnnotationToolbarMode newMode) { if (newMode == PSPDFAnnotationToolbarMode.None && annotationToolbar.Window != null) { // don't show all toolbar features, hide instead. annotationToolbar.HideToolbar(false, () => { annotationToolbar.RemoveFromSuperview(); }); } }