setting atom stize using scripts in DS ViewerPro 5.0

I am looking for help with using the scripting in DS ViewerPro 5.0.
If a use the "ball and stick" display style for my atmos, I can set the ball size and the stick size manually unter
left click on atom > display style...>

is there any possibility to set these values using the scripting function?
Nothing is mentioned in the helpfiles about how to set them.

cheng