[%- MACRO label2key(label) BLOCK -%]
  [% ###FIXME redo this as one block rather than several %]
  [% key %]
  [% FOREACH language = config.language.language %]
    [% key = config.setting(label,"key:${language}") %]
    [% LAST IF key %]
  [% END %]

  [% IF !key ; key = config.setting(label,'key') ; END %]
  [% IF !key ; key = config.setting(label,'key') ; END %]
  [% #FIXME this is supposed to rely on get_external_presets()# IF !key ; key = label ; END %]
  [% IF label.match(':overview$') ; key = "${key}*" ; END %]

  [% key %]
[%- END -%]

[%- MACRO unit_label(value) BLOCK -%]
  [%-
  unit    = config.setting('units') || 'bp';
  divider = config.setting('unit_divider') || 1;
  IF (value != 1 || divider <= 1) ;
    value = value / divider;

    IF value >= 1000000000 ; 
      label = value / 1000000000    FILTER format("%.4g G") ;
    ELSIF value >= 1000000 ;
      label = value / 1000000       FILTER format("%.4g M") ;
    ELSIF value >= 1000 ;
      label = value / 1000          FILTER format("%.4g K") ;
    ELSIF value >= 1 ;
      label = value / 1             FILTER format("%.4g") ;
    ELSIF value >= 0.01 ;
      label = value * 100           FILTER format("%.4g c") ;
    ELSIF value >= 0.001 ;
      label = value * 1000          FILTER format("%.4g m") ;
    ELSIF value >= 0.000001 ;
      label = value * 1000000       FILTER format("%.4g u") ;
    ELSIF value >= 0.000000001 ;
      label = value * 1000000000    FILTER format("%.4g n") ;
    ELSIF value >= 0.000000000001 ;
      label = value * 1000000000000 FILTER format("%.4g p") ;
    END ;

    label = label _ unit ;
  ELSE ; 
    label = 0 ;
  END ;
  label ;
  -%]
[%- END -%]