The stepY specifies the number of characters (LINES) between 2 repetitions.

This property is relevant only if rowCount > 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 STEPY attribute in Genero BDL. For related topics, search on GRID and SCROLLGRID in the Genero Business Development Language User Guide.