The stepX specifies the number of characters (COLUMNS) between 2 repetitions.

This property is relevant only if columnCount > 1.

This property is found in the Matrix details section. A matrix element is valid within a grid or scrollgrid container.

There is not an explicitly-named STEPX attribute in Genero BDL. For related topics, search on GRID and SCROLLGRID in the Genero Business Development Language User Guide.