PictureFormat Object (PowerPoint)
Contains properties and methods that apply to pictures and OLE objects.
Example
Use the PictureFormat property to return a PictureFormat object. The following example sets the brightness, contrast, and color transformation for shape one on myDocument and crops 18 points off the bottom of the shape. For this example to work, shape one must be either a picture or an OLE object.
Set myDocument = ActivePresentation.Slides(1)
With myDocument.Shapes(1).PictureFormat
.Brightness = 0.3
.Contrast = 0.7
.ColorType = msoPictureGrayScale
.CropBottom = 18
End With