** Horizontal (right to left)

*''Number of Horizontal Pages'': GraphViz can create very large graphs by spreading the graph across a rectangular array of pages. This controls the number of pages in the array horizontally. '''Only valid for dot and pdf via Ghostscript'''.

*''Paging Direction'': The order in which the graph pages are output. This option only applies if the horizontal pages or vertical pages are greater than 1.