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h2. Overview
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|*Area*|!chart_area.png!|You want to emphasize the magnitude of change over time. Use an area chart to show how much the value of a measure changes over time.
|*Stacked Area*|!chart_area_stacked.png!|You want to emphasise the magnitude of change over time, while comparing multiple categories.|

h3. Chart Data Options
||Option||Description||
|Horizontal Axis|This is the category label for the X axis|
|Vertical Axis|Typically a numeric value such as $.  An item that you want to measure on your Chart|
|Colour|This option is only available if you have a cross tab data set available and is used to determine the colour applied for cross tab series data.|


h2. Area Chart Tutorial
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h3. Summary
In order to set up an Area Chart you will need:
# Create a report with chart display
## Select a field to use as the *Horizontal Axis*
## Select a field to use as the *Vertical Axis*
## Select a field to use as the *Colour* (if you have decided to create a cross tab report)
# Create your chart, selecting *Area* as the type
# Provide the *Horizontal Axis*, *Vertical Axis*, and *Colour* options 
# Customise the Chart as required
# Proceed to the *Output* step
# *Save* your report

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