[PyMOL] question on differential coloring of protein chains

[ALEX DAJKOVIC]

hello-
i am new to pymol and am trying to figure out how to differentially
color different chains (i.e. different proteins) in the structure i am
viewing.  the structure i am working with is actually a structure of two
proteins that were co-crystalized and i would like assign different
colors to them. 
thanks for your help. 
alex dajkovic