[GRASS-user] add superscript to units on a legend

[Davies, Kalu]

Hi…

I’m trying to create a map of soil carbon stocks so I would like the legend to display the units as "Mg C per ha" however I would prefer that the “per ha” was represented as “ha^-1” but obviously without the “^” and using superscript instead. 

I have found how to set the units in r.support, however I cannot figure out how to format them with the superscript? 

many thanks...