Dear Eleysanne,

my apologies for the late reply. Any additional style (font-family, font-size, font-weight, color, etc.) can be applied as per the documentation for Bio::Phylo::Treedrawer::Svg. Basically, what you do is iterate in this case over all nodes, and for each node add

In other words, add a key called 'svg' and a value consisting of a hash reference where the keys are standard CSS properties and the values are standard CSS values.

Hope this helps,

Rutger