Advance XML flashchart (overlay) drilldown and time

How to drilldown a chart from these commands ? The _time can it be changed to display time for hourly ? Any suggestion ?

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<module name="HiddenSearch" layoutPanel="panel_row1_col1" group="Overall Temperature" autoRun="True">
<param name="search">sourcetype="CurrentWeatherSG" | timechart span=1hour max(current_temperature) as Max, mean(current_temperature) as Mean,min(current_temperature) as Min</param>

<param name="groupLabel">Overall Temperature</param>
  <module name="HiddenFieldPicker">
    <param name="strictMode">True</param>
    <module name="JobProgressIndicator">
      <module name="EnablePreview">
        <param name="enable">True</param>
        <param name="display">False</param>
        <module name="HiddenChartFormatter">

          <param name="charting.axisY">numeric</param>
          <param name="charting.axisX">time</param>
          <param name="charting.axisTitleY.text">Celsius (°C)</param>
          <param name="charting.transparentBrushPalette">solidFill</param>
          <param name="charting.chart">column</param>
          <param name="charting.chart.columnAlignment">.5</param>

          <param name="charting.axisY.maximumNumber">36</param>
          <param name="charting.axisY.minimumNumber">20</param>
          <param name="charting.transparentBrushPalette.alpha">0.7</param>

          <param name="charting.axisLabelsX.majorUnit">P1M</param>
          <param name="charting.axisLabelsX.minorUnit">P1M</param>
          <param name="charting.axisY2">numeric</param>
          <param name="charting.axisY2.minimumNumber">20</param>
          <param name="charting.axisY2.maximumNumber">36</param>
          <param name="charting.axisLabelsY2">#axisLabelsY</param>
          <param name="charting.axisLabelsY2.axis">@axisY2</param>
          <param name="charting.axisLabelsY2.placement">right</param>

          <param name="charting.data0">results</param>
          <param name="charting.data0.jobID">@data.jobID</param>

          <param name="charting.data1">view</param>
          <param name="charting.data1.table">@data0</param>
          <param name="charting.data1.columns">[0,1,3]</param>

          <param name="charting.data2">view</param>
          <param name="charting.data2.table">@data0</param>
          <param name="charting.data2.columns">[0,2]</param>

          <param name="charting.chart.data">@data1</param>

          <param name="charting.chart2">line</param>
          <param name="charting.chart2.axisY">@axisY2</param>

          <param name="charting.chart2.data">@data2</param>

          <param name="charting.layout.charts">[@chart,@chart2]</param>

          <param name="charting.layout.axisTitles">[@axisTitleX,@axisTitleY,@axisTitleY2]</param>

          <module name="FlashChart">
                        <param name="width">100%</param>
                        <param name="height">300px</param>

          </module>