-o#

Label vertices starting at # (default 0). This can be overridden in the input.

-n#

Set the initial graph order to # (no default). This can be overridden in the input.

-g

Use graph6 format (default for undirected graphs).

-z

Use digraph6 format (default for directed graphs).

-s

Use sparse6 format.

-h

Write a header (according to -g, -z or -s).

-q

Suppress auxiliary output.

n=#

set number of vertices (no default) The = is optional.

$=#

set label of first vertex (default 0) The = is optional.

d

indicate graph will be directed

$$

return origin to initial value (see -o#)

g

specify graph to follow (as dreadnaut format) Can be omitted if first character of graph is a digit or ’;’.

q

exit (optional)