Rlabel displays labels containing residue name and specifier for residues with any atom in atom-spec. (Residue labels containing other information can be displayed using the Actions menu.) Residue labels are placed next to a "representative" atom: CA in amino acid residues, C4' in nucleic acid residues, and in other residue types, the atom with the name that falls first in alphabetical order. Label font and size can be set in the Background preferences.
Rlabel differs from the original Midas command, which merely allowed residue information to be shown if a residue had one or more atom labels.
~Rlabel removes residue labels.
See also: label, labelopt, the Actions menu