[Amps] Meter Face Making

[Bob Maser]

I am trying to make some new meter scales using the trial version of the 
Tonne software called "Meter".  I am trying to make a center zero scale. 
What I want is 100ma - 0 - 100ma.  I can't find on the Tonne software where 
this can be done.  It makes the zero on the left end of the scale only.  Am 
I missing something?  Can someone direct me to free software that can do 
this?

Thanks,
Bob  W6TR