Sub FormatAll()
  'Code that looks through each shape and then formats the text to
  'a specific type of font.
  
  Dim pst As Presentation, CheckSlide As Slide, CheckShape As Shape
  
  Set pst = ActivePresentation
  
    On Error Resume Next 'Skip over no text shapes and wordart.
    For Each CheckSlide In pst.Slides
      For Each CheckShape In CheckSlide.Shapes
        'Times New Roman, 60pt, Bold, font color, Sentence case, no shadow, etc
        With CheckShape.TextFrame.TextRange.Font
          .Name = "Times New Roman"
          .Size = 60
          .Bold = msoTrue
          .Color = vbBlack
          'Add other attributes as needed.
        End With
      Next CheckShape
    Next CheckSlide
    On Error GoTo 0
End Sub