# 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: . - Adjust one or more directed graphs to improve the layout aspect ratio: `unflatten {{path/to/input1.gv}} {{path/to/input2.gv ...}} > {{path/to/output.gv}}` - Use `unflatten` as a preprocessor for `dot` layout to improve aspect ratio: `unflatten {{path/to/input.gv}} | dot -T {{png}} {{path/to/output.png}}` - Display help: `unflatten -?`