1. 3D lines
2. Line width

Display 3D lines.

<applet code=com.objectplanet.chart.LineChartApplet
 archive=chart.jar width=300 height=200>
<param name=sampleValues value="20,10,40,30,50">
<param name=3DModeOn value=true>
</applet>

<applet code=com.objectplanet.chart.LineChartApplet
 archive=chart.jar width=300 height=200>
<param name=seriesCount value=3>
<param name=sampleValues_0 value="51,42,41,43,31,31,34,43,22">
<param name=sampleValues_1 value="65,66,43,55,60,56,45,64,56">
<param name=sampleValues_2 value="75,78,69,67,65,78,70,68,78">
<param name=rangeStep value=100>
<param name=valueLinesOn value=true>
<param name=3DModeOn value=true>
</applet>

You can control the depth of the chart using the 3DDepth parameter.

<applet code=com.objectplanet.chart.LineChartApplet
 archive=chart.jar width=300 height=200>
<param name=seriesCount value=3>
<param name=sampleValues_0 value="51,42,41,43,31,31,34,43,22">
<param name=sampleValues_1 value="65,66,43,55,60,56,45,64,56">
<param name=sampleValues_2 value="75,78,69,67,65,78,70,68,78">
<param name=rangeStep value=100>
<param name=valueLinesOn value=true>
<param name=3DModeOn value=true>
<param name=3DDepth value=12>
</applet>

Set the line width

<applet code=com.objectplanet.chart.LineChartApplet
 archive=chart.jar width=300 height=200>
<param name=sampleValues value="20,10,40,30,50">
<param name=lineWidth value="5">
</applet>

<applet code=com.objectplanet.chart.LineChartApplet
 archive=chart.jar width=300 height=200>
<param name=seriesCount value=3>
<param name=sampleValues_0 value="20,10,40,30,50">
<param name=sampleValues_1 value="50,30,40,10,20">
<param name=sampleValues_2 value="30,10,20,50,40">
<param name=lineWidth value="1,3,6">
</applet>