[png] PPT to PNG with transparent background

It can't be done, either manually or progamatically. This is because the color behind every slide master is white. If you set your background to 100% transparent, it will print as white.

The best you could do is design your slide with all the stuff you want, group everything you want to appear in the transparent image and then right-click/save as picture/.PNG (or you could do that with a macro as well). In this way you would retain transparency.

Here's an example of how to export all slides' shapes to seperate PNG files. Note:

  1. This does not get any background shapes on the Slide Master.
  2. Resulting PNGs will not be the same size as each other, depending on where the shapes are located on each slide.
  3. This uses a depreciated function, namely Shape.Export. This means that while the function is still available up to PowerPoint 2010, it may be removed from PowerPoint VBA later.

    Sub PrintShapesToPng()
        Dim ap As Presentation: Set ap = ActivePresentation
        Dim sl As slide
        Dim shGroup As ShapeRange
        For Each sl In ap.Slides
            ActiveWindow.View.GotoSlide (sl.SlideIndex)
            sl.Shapes.SelectAll
            Set shGroup = ActiveWindow.Selection.ShapeRange
            shGroup.Export ap.Path & "\Slide" & sl.SlideIndex & ".png", _
                                ppShapeFormatPNG, , , ppRelativeToSlide
        Next
    End Sub
    

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