# circo > Render an image of a `circular` network graph from a `graphviz` file. > Layouts: `dot`, `neato`, `twopi`, `circo`, `fdp`, `sfdp`, `osage` & `patchwork`. > More information: . - Render a PNG image with a filename based on the input filename and output format (uppercase -O): `circo -T {{png}} -O {{path/to/input.gv}}` - Render a SVG image with the specified output filename (lowercase -o): `circo -T {{svg}} -o {{path/to/image.svg}} {{path/to/input.gv}}` - Render the output in PS, PDF, SVG, Fig, PNG, GIF, JPEG, JSON, or DOT format: `circo -T {{format}} -O {{path/to/input.gv}}` - Render a GIF image using `stdin` and `stdout`: `echo "{{digraph {this -> that} }}" | circo -T {{gif}} > {{path/to/image.gif}}` - Display help: `circo -?`