//Stores slide-size crop of the current slide as a global variable
private void AddZoomSlideCroppedPicture(float magnifyRatio = 1.0f)
{
PowerPointSlide zoomSlideCopy = this.Duplicate();
Globals.ThisAddIn.Application.ActiveWindow.View.GotoSlide(zoomSlideCopy.Index);
Shape cropShape = zoomSlideCopy.Shapes.AddShape(Office.MsoAutoShapeType.msoShapeRectangle, 0, 0, PowerPointPresentation.Current.SlideWidth - 0.01f, PowerPointPresentation.Current.SlideHeight - 0.01f);
cropShape.Select();
Selection sel = Globals.ThisAddIn.Application.ActiveWindow.Selection;
Shape croppedShape = CropToShape.Crop(zoomSlideCopy, sel, magnifyRatio: magnifyRatio);
zoomSlideCroppedShapes = GraphicsUtil.CutAndPaste(croppedShape, _slide);
zoomSlideCroppedShapes.Name = "PPTLabsMagnifyAreaGroup" + DateTime.Now.ToString("yyyyMMddHHmmssffff");
ShapeUtil.FitShapeToSlide(ref zoomSlideCroppedShapes);
zoomSlideCopy.Delete();
}