I had this problem and solved it like this:
1. gnumeric files are zip files
2. unzip the file, you may have to change the extension to .zip
3. the unzipped file is an XML file with a structure that is very
straightforward
4. open the file and find the following
If you have mora than one chart, you will have to identify the correct one
somehow
<gnm:SheetObjectGraph ...>
<GogObject type="GogGraph">
<GogObject role="Chart">
<GogObject role="Grid">
<GogObject role="X-Axis">
5. Add this at the end of the <GogObject role="X-Axis">
<GogObject role="MajorGrid">
<property name="style" type="GogStyle">
<line auto-dash="1" auto-width="1" auto-color="0"
color="C0:C0:C0:FF"/>
<fill type="none" auto-type="1" is-auto="1"
auto-fore="1"/>
</property>
<property name="id">1</property>
</GogObject>
6. change the extension to .gnumeric
7. open the new file in gnumeric and voila!
At next save gnumeric will zip the file again.
--
Sent from: http://gnome-apps.13852.n7.nabble.com/GnuMeric-f3818.html
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