6UPLABEL: atoms set - UPLABEL command

Parameters: selection=<string>             (default: <blank>)
            label
            marker
            undefined                      
            all                            

Command to set properties of the atoms that match the selection
<string>. By default, the selection made in the most recent 'atoms
select' command is used, or all atoms if no selection has been made
so far.

Properties that can be set:

Label sets a score that indicates how desirable it is if it is 
included into the schedule. Specify scoreweight=1 if it is to be 
used in the UPlabel calculation.
Marker enables the user to specfiy that a part of the sequence can 
be distinguished from the rest with another experiment or separate 
Information e.g. using line widths to distinguish unique pairs.

