2.1.1156 Part 1 Section 20.228, presentation:display-header
a. The standard defines the attribute presentation:display-header, contained within the element <style:drawing-page-properties>
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This attribute is supported in PowerPoint 2013, PowerPoint 2016, and PowerPoint 2019.
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On load, this attribute is read to determine whether to display the header. It is not written on save.