First label style
Specify style attributes that override the settings inherited from the style sheet for the First value label.
The First label style property can be used to style the First value label for the first row. The styling is applied in-line, overriding any styles set in the style sheet used by the Grid Component.
The first row is only shown when the First property in the Summary values section for one or more fields has been checked.
The default value of First label style is "text-align:right;".