The RasMol scripting language has two synonymous
commands to control atom size, spacefill and cpk
(for Corey, Pauling, and Koltun). The commands are aliases and run
exactly the same code.
As an extension to the RasMol scripting language, Jmol
allows you to specify your size as a percentage of the
If you want to specify a fixed size then you can do so in Angstroms.
Note that the last button specifies "1.0" instead of the integer "1".
This is important because integer values specify
RasMol units (1/250th Angstrom)