ColumnSpacing Element (RDL)
Defines the spacing between columns.
The string for the ColumnSpacing element must contain a number (with a period character used as an optional decimal separator). The number must be followed by a designator for a CSS length unit such as cm, mm, in, pt, or pc. A space between the number and the designator is optional. For more information about size designators, see "CSS Length Units Reference" at msdn.microsoft.com.
The maximum value for ColumnSpacing is 160 in. The minimum value is 0 in.