Saving a 2007 file as 2003 - photos seem to decompress

[VLCB2007]

I have made a presentation in PP 2007. The file size is approx 8MG however
once I compress the photos it goes down to about 1MG. Then when I save the
file as a 2003 version the photos seem to decompress as the file size is once
again 8MG. Anyone have any idea how I can fix this?

 

[Echo S]

It might actually be text or other image effects causing this, because when
you backsave as 2003 format, text with nonsupported features (like glows and
reflections) are converted to images.

Do you have anything like this in the file?

 

[Ute Simon]

I have made a presentation in PP 2007. The file size is approx 8MG
however

once I compress the photos it goes down to about 1MG. Then when I save the
file as a 2003 version the photos seem to decompress as the file size is once
again 8MG. Anyone have any idea how I can fix this?

PowerPoint 2007 uses a new file format: PPTX files contain XML files which
are zipped. PowerPoint 2003 files are not zipped, which makes them larger.
Try a third-party tool like WinZip, which might be able to compress them.

Best regards,
Ute