Re: [Jmol-users] DRAW Charges on atoms + and -

[A. H. <ang...@ua...>]

Nick wrote.
> Hi Angel, A very timely contribution. I was looking for a way to showpositiveand negative 
> charges on atoms. 
> A few experiments later I find that 
> draw  {atomno=4} "+"
> draw  {atomno=4} "-" 
> works quite nicely. 

Nick, why don't you use labels for that?

select atomno=4; label +    # or label "+"
set labelOffset 0 0  # if you want them right over the atom center
font label 22 serif bold
color label orange

> Control over the colour and font size would be great and Bob suggested that Unicode characters 
> might also work but although they might provide even more scope, I'm unsure how to deploy 
> them. 

Unicode characters may be used in labels and in echos (3D-positioned echos are another 
choice, by the way, like this:

label "\u21D2"

where 21D2 is the hexadecimal Unicode for a double right-arrow; in my tests, not all 
unicode characters are allowed, but many are.