I'm working on a spreadsheet together with another person, sending new versions forth and back by email. It contains nothing fancy. While he uses Windows I'm on Ubuntu 12.04.4 LTS. The first version he sent was only 30 k. When I opened it in LibreOffice 18.104.22.168 (current Ubuntu version of OpenOffice) and just saved it again (still using the Excel format) it was 2.6 MB! After my edits it was 5 MB large which is not acceptable.
file has to say about the original Microsoft Office file is:
Composite Document File V2 Document, Little Endian, Os: Windows, Version 6.2, ... Name of Creating Application: Microsoft Excel, ... Security: 0
After saving as Excel from LibreOffice,
file says almost the same. Differences are: Version 1.0 instead 6.2, Code page: -535 instead 1252, Revision Number: 1 (not present in original file), Name of Creating Application and Security: no longer there.
Is there a way to reduce the file size?