code: protected void createDefaultLevels() {
          this.listLevels = new ArrayList();	// listlevels
          for(int i=0; i<=8; i++) {
              // create a list level
              RtfListLevel ll = new RtfListLevel(this.document);
              ll.setListType(RtfListLevel.LIST_TYPE_NUMBERED);
          	ll.setFirstIndent(0);
          	ll.setLeftIndent(0);
          	ll.setLevelTextNumber(i);
              ll.setTentative(true);
              ll.correctIndentation();
              this.listLevels.add(ll);
          }
  
      }
docs: Create a default set of listlevels
  @since 2.1.3