Use this option to assign custom style attributes to a row or column header. This is different from the Style option of the HeaderOption keyword in that it applies to a row or column header as a whole as opposed to a single dimension across all headers. When there is a conflict, the CustomHeaderStyle option will be used over HeaderOption:Style keyword. To mix the two styles instead of the CustomHeaderStyle being used, insert a semicolon before the CustomHeaderStyle option as in the example below. See Style.
This option uses the standards supported by the W3C. See http://www.w3.org/tr/rec-css2.
CustomHeaderStyle:Property:Value
C1=S#Actual.Y#2009,CustomHeaderStyle:;font:italic 12px arial;color:red