gvpack

Combine several graph layouts (that already have layout information). Graphviz filters: acyclic, bcomps, comps, edgepaint, gvcolor, gvpack, mingle, nop, sccmap, tred, & unflatten. More information: https://graphviz.org/pdf/gvpack.1.pdf.

gvpack path/to/layout1.gv path/to/layout2.gv ... > path/to/output.gv

gvpack -g path/to/layout1.gv path/to/layout2.gv ... > path/to/output.gv

gvpack -n path/to/layout1.gv path/to/layout2.gv ... > path/to/output.gv

gvpack -u path/to/layout1.gv path/to/layout2.gv ... > path/to/output.gv

gvpack -?