−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)