Thank you


"Ute Simon" wrote:
PPT and PPS in older PowerPoint versions including 2003 is the same file,
only the file extension is changed. In PowerPoint 2007 PPTX and PPSX are
still the same file, but in addition to the file extension the file type is
saved in the document, too.

But there's no influence on quality and editability. You will lose quality
and editability if you save a file created in 2007 to PPT or PPS, because
the older versions do not have some of the newer features.

Best regards,
Ute


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