This page provides an example for row styles usage; consider Monthly Temperatures temperatures table, for which you want to set background colors and use various font styles for different rows.
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Define these parameters/values
Row formatting > Data rows > Row Styles (1 2 3) | background:lightgrey background:lightblue font-style:italic; font-size: 1.2em; |
Row formatting > Header & Footer rows > Header row styles | font-size: 2.0em; font-style:bold; |
Screenshot
Example result
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