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So I am giving my first shot at making a Mma slideshow. But I am finding difficult to change the formatting of Sections and others in the slideshow.

I can change the style of Sections in the Working environment through the Format > Edit Stylesheet menu. Yet, even when I change the environment to Slideshow (via Format > Screen Environment > Slideshow), and then edit the stylesheet I see no results.

Here is what I see in the stylesheet editor when trying to change the style of the slideshow:

Cell[StyleData[StyleDefinitions -> FrontEnd`FileName[{"SlideShow"}, "Sapphire.nb", 
  CharacterEncoding -> "WindowsANSI"]]]


Could you tell me what I am doing wrong? I tried changing the Font to Calibri and make it Bold, but when I start the presentation, none of this shows up.

Thanks in advance

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There is a comma missing after CharacterEncoding -> "WindowsANSI"]]] – Sjoerd C. de Vries Apr 17 '13 at 14:10
Have you tried to toggle back the cell to the formated mode (ctrl+shift+E) and change to the Sideshow Environment? – Spawn1701D Apr 17 '13 at 14:25
@SjoerdC.deVries, this was a manual copy of the two cells in the stylesheet editor, but there is no comma there. I have two separate cells there. Spawn1701D, yes. Section still shows the same formatting as before – Sosi Apr 17 '13 at 14:50
up vote 2 down vote accepted

From documentation:

  StyleData["style", "environment"]      represents the contents of a style definition
                                         cell in the style environment "environment"

So, you need to modify existing cell or add a new: Cell[StyleData["Section", "SlideShow"], ...]

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