Atom labels in SHELXL.RES files can be changed interactively in a RENAME loop using PLUTON for interactive display.
Renaming can be looped. A return keeps the label as is. When a number is given in place of a substitute label, this number is concatenated with the current atom type.
The modified .res file in written out with the .new extension.
Alternatively, renaming can be invoked via the '-r' switch e.g. platon -r sucrose.res.