unflatten

Adjust directed graphs to improve the layout aspect ratio. Graphviz filters: acyclic, bcomps, comps, edgepaint, gvcolor, gvpack, mingle, nop, sccmap, tred, & unflatten. More information: https://www.graphviz.org/pdf/unflatten.1.pdf.

unflatten path/to/input1.gv path/to/input2.gv ... > path/to/output.gv

unflatten path/to/input.gv | dot -T png path/to/output.png

unflatten -?