[Chimera-users] custom residue label

How to programmatically set a residue label to an arbitrary text, e.g. to say something like: rlabel :656.E "Lys-57" What happens in some structures, like for instance 1U35 structure that contains H3 proteins, is that residue numbers in a PDB file is different from residue number of the sequence. In this particular example Lys57 of H3 on chain E maps to PDB residue number 656. So if I use default labeling I am getting wrong results...