2.1.237 Section 15.5.20, Top and Bottom Margins
The standard defines the attribute fo:margin-bottom within the element <style:paragraph-properties>: WordPad supports the fo:margin-bottom attribute on Read. On Save, the value MUST be written out as an absolute length rather than a percentage.
The standard defines the attribute fo:margin-top within the element <style:paragraph-properties>: WordPad supports the fo:margin-top attribute on Read. On Save, the value MUST be written out as an absolute length rather than a percentage.