private void deltaZoomBrowser(double delta) { if (!mini) { Task <double> zoomRatio = GPMBrowser.GetZoomLevelAsync(); zoomRatio.Wait(); double currentZoom = zoomRatio.Result; double newZoom = Math.Log10(Math.Pow(10, currentZoom) * delta); GPMBrowser.SetZoomLevel(newZoom); Properties.Settings.Default.MaxiZoomLevel = newZoom; } }