anchor.diff:      rowOffsetFromPageTop = topOffset + (rowHeightAsPagePct*(rowNum));
       fuzzyRowOffsetFromPageTop = rowOffsetFromPageTop - margin;
   
  -    if(window.viewer.world.getItemCount() > 0) {
  +    if (window.viewer.world.getItemCount() > 0) {
         // now transpose for viewport coordinates
         viewportY = fuzzyRowOffsetFromPageTop * window.viewer.world.getItemAt(0).normHeight;
         viewportHeight = fuzzyRowHeightAsPagePct * window.viewer.world.getItemAt(0).normHeight;
  
positive.code:           <%= transcription_field.bottom_offset %>);
        <% end %>
      },
      afterCreateRow: updateHotHeight,
      afterRemoveRow: updateHotHeight,
      manualColumnResize: true,
      manualRowResize: true,
      afterChange: function(changes, source) {
        document.getElementById('<%= "fields-#{transcription_field.id}" %>').value = JSON.stringify(this.getData());
      },
      startRows: <%= transcription_field.starting_rows %>,
    });
  
    // $(container).data('hot-object', hot);
  
negative.code:     contextMenu: ['row_above', 'row_below', 'remove_row', 'undo', 'redo', 'cut', 'copy'],
      dropdownMenu: true,
      columns: columnConfig,
      manualColumnResize: true,
      manualRowResize: true,
      startRows: <%= transcription_field.starting_rows %>,
      afterCreateRow: updateHotHeight,
      afterRemoveRow: updateHotHeight,
      afterChange: function(changes, source) {
        document.getElementById('<%= "fields-#{transcription_field.id}" %>').value = JSON.stringify(this.getData());
        if (changes) {
          var rowsCount = this.countRows();
          changes.forEach(([row, prop, oldValue, newValue]) => {
            if (row + 1 === rowsCount) {
              this.alter('insert_row', rowsCount);
            };
          });
        }
      },
      afterSelection: function(row, column, row2, column2, preventScrolling, selectionLayerLevel) {
        <% if transcription_field.row_highlight %>
          highlightRow(row,
            <%= transcription_field.starting_rows %>,
  