size

To specify the size of the pie, add the size key to your chart. The height you specify is in pixels, and is used both on dashboard, and on chart pages.

Ex:

{
  "field": "fields.Themes",
  "type": "pie",
  "size": {
    "height": 400
  }
}

You can add a columns property too, knowing that the display has a "width" of 12 columns (Twitter bootstrap).

Here is an example where the pie should take half of the page's width:

{
  "field": "fields.Themes",
  "type": "pie",
  "size": {
    "height": 400,
    "columns": 6
  }
}

If you need to separate two charts, you can add an offset before a chart, using offset property. It is a number which represent the "width" of offset columns.

Below is an example where the horizontal bars should take 5 columns, with a preceding offset of 1 column.

{
  "field": "fields.Themes",
  "type": "horizontalbars",
  "title": "Thèmes",
  "size": {
    "height": 420,
    "columns": 5,
    "offset": 1
  }
}

Note: columns and offset properties are taken into account only on dashboard (index) page.

legend

To specify where you want the legend to be, add the legend key to your chart, with an object as a value.

In general, you can find what's possible in legend in amCharts documentation.

The position can take 4 values: 1. 'bottom' (default) 2. 'right' 3. 'left' 4. 'top'

Ex:

{
  "field": "fields.Themes",
  "type": "pie",
  "legend": {
    "position": "left"
  }
}

If you don't want a legend, remove legend key from the chart.

If you need one, simply add "legend": {} in the chart.

{
  "field": "fields.Themes",
  "type": "pie",
  "legend": {}
}

Or use the enabled property:

{
  "field": "fields.Themes",
  "type": "pie",
  "legend": {
    "enabled": true
  }
}

color

You can set a color value (hexadecimal color value). Example with a red histogram:

{
  "dashboard": {
    "charts" : [
      {
        "field": "content.json.Year",
        "type": "histogram",
        "color": "#ff0000"
      }
    ]
  }
}

colors

In a pie, you can parameter a set of colors to be used:

{
  "dashboard": {
    "charts" : [
      {
        "field": "content.json.Keywords",
        "type": "pie",
        "colors": [ "#BB9FF5", "#ff7a85", "#44b2ba", "#ffa65a", "#34cdb8"]
      }
    ]
  }
}

In a map, you can also parameter a set of colors, but you can use ColorBrewer to choose only a color scale name (default value: "YlOrRd" -Yellow, Orange, Red-, but you can try "RdYlBu" -Red, Yellow Blue-, or "BuGn", -Blue, Green-):

{
  "dashboard": {
    "charts" : [
      {
        "field": "content.json.country",
        "type": "map",
        "colors": "OrRd"
      }
    ]
  }
}

Or you can use the following syntax (which allows you to add other color options):

{
  "dashboard": {
    "charts" : [
      {
        "field": "content.json.country",
        "type": "map",
        "colors": {
          "scale" : "OrRd"
        }
      }
    ]
  }
}

You can set the type scale you want (or the distribution of the values in the colors):

• linear: classic
• log (default value): logarithmic scale
• quantiles
• k-means

{
  "dashboard": {
    "charts" : [
      {
        "field": "content.json.country",
        "type": "map",
        "colors": {
          "scale"   : "OrRd",
          "distrib" : "linear"
        }
      }
    ]
  }
}

help

You can add a helping text for a particular chart, in the help key:

{
  "dashboard": {
    "charts": [
      {
        "field": "fields.Themes",
        "type": "pie",
        "help": "Each document may be labelled with several themes"
      }
    ]
  }
}

This help text is a markdown text, and will appear after the title of the page pages.chart.title, and possibly after the charts' help text pages.chart.help, which appear on all charts' pages.