METHODS
new
loc
my $label = $graph -> label(…);
$label->loc('t'); # put label to top of graph
For graphs and clusters, only "t" (top)and "b" (bottom, default) are allowed.
Possible values for nodes seem to be "t", "b" and "c" (centered, default). The value is only used when the height of the node is larger than the height of its label.