There are 10 SystemTitle classes, one for each possible title statement. Their names are SystemTitle (for title1) and SystemTitle2-SystemTitle10. If you want to modify the style for title2 use the SystemTitle2 class. When you modify one of the SystemTitle classes, all of the higher-numbered SystemTitle classes automatically get the modification as well. So if you set the fontsize of SystemTitle2 to, say, 24pt, then SystemTitle3-SystemTitle10 get that fontsize. The PowerPointLight and PowerPointDark styles specify that SystemTitle uses fontsize=42pt, SystemTitle2 uses fontsize=24pt, and SystemTitle3-SystemTitle10 uses fontsize=20pt.
You can read more about ODS styles here.
Here's how to view the PowerPointLight and PowerPointDark styles that we supply for the destination for PowerPoint.
Good luck!
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