axis titles: formatting

[Jakob <ratflat gmx de>]

Hi,

I would like to know if it is somehow possible to change the formatting 
of the axis titles and data set titles in a scatter plot. As I use 
gnumeric for a biological purpose, sometimes the data set titles are 
names of bacteria, which have to be written in italics. Furthermore, if 
I want to plot, e.g., partial pressure of oxygen versus time, I would 
like to put the 2 in O2 as an index. Is there a possiblity to solve this 
problem?

Thanks in advance,
Jakob