Change the symbol style

Once you've decided how you'd like to present your map layer—for example, using circles or colors to show population—you can make changes to its appearance that are immediately reflected on the map. ArcGIS for Power BI gives you control over the graphic elements, such as symbols, colors, transparency, and classification types.

The styling choices you see when you click Symbol style are determined by the nature of the data you're mapping and the map theme you've selected.

Styling changes are global; that is, changes are maintained even when you switch to a different map theme. For example, if you changed the location symbol from a circle to a square and then change to a different map theme, the square symbol persists. When you click Revert to defaults on a specific styling section, all styling changes in that section revert to the default setting across all relevant map themes.

Note:

The default styling options are different depending on which field wells contain values and the nature of those values.

If you make global styling changes and then change any of the visual's field wells, some styling changes you initially made to the layer may be lost and reverted to default values. For example, if you change the point symbol from a circle to a square, the symbol will remain a square if you replace or add a field to the Color field well because the color field doesn't affect the symbol. If you make changes to color breaks in a classification and then replace the existing Color field well, however, the style will revert to defaults because you're changing the values used to render the color ramp.

To change the style of the symbols on your layer, do the following:

  1. Open a map-enabled report or create a new one. If necessary, place the report in Author mode.
  2. In the Layers list, click Layer options Layer options on the data layer you want to modify and choose Symbology.
    Tip:

    The Symbology option appears only on layers created using Power BI data.

    The Symbology pane appears, listing available options based on the nature of the layer's data.

  3. Change the symbol styling options as desired.

    Different styling options are available for each map theme; refer to the sections below for more information about each one.

    Any changes you make appear immediately on the map.

Location Only

To change the symbol styling for a map styled using the Location Only theme, do any of the following:

  1. In the Symbology pane, expand the Symbol style category.
  2. To set the Symbol style options, do the following:
    • To change the symbol marker, choose one of the listed shapes. Symbol options are available only for point locations, not polygons.
    • To change the Size parameter of the symbol, move the Symbol size slider to the left (smaller) or to the right (larger), or type a pixel value in the field.
    • Note:

      Point symbols that represent no value are shown on the map and Layers list using the default marker and color.

      To change the symbol's Fill color parameter, click the arrow on the drop-down menu to display a color palette and choose a new fill color for the symbol.
    • To change the symbol's Fill transparency parameter, move the slider to the left (less transparent) or to the right (more transparent), or type a percentage value in the field.
    • To change the symbol's Outline color parameter, click the arrow on the drop-down menu to display the color palette and choose a new outline color for the symbol.
    • To change the symbol's Outline thickness parameter, move the slider to the left (thinner) or to the right (thicker), or type a pixel value in the field.
    • To change the symbol's Outline transparency parameter, move the slider to the left (less transparent) or to the right (more transparent), or type a percentage value in the field.
    • To discard your changes, click Revert to defaults.

Heat Map

To change the symbol styling for a map styled using the Heat Map theme, do any of the following:

  1. In the Symbology pane, click the Heat map theme and expand the Heat map style category.
  2. To set Heat map style options, do the following:
    • To make the clusters larger and smoother, or smaller and more distinct, adjust the Area of influence slider.
    • To change the colors used to draw on the map, click a color ramp from the available options. To reverse the colors that represent high values and those that represent low values, click the Inverse button Inverse color ramp. Click the button again to reset the color ramp to its original orientation.
    • Optionally, drag a numeric value into the Size field well to better define the heat map properties.
    • To discard your changes, click Revert to defaults.

Note:

Because the heat map uses a specified color ramp to render point density, any value in the Color field well is ignored.

Clustering

The change the symbol styling for a map styled using the Clustering theme, do any of the following:

  1. In the Symbology pane, click the Clustering map theme and expand the Cluster style category.
  2. To set Cluster style options, do the following:
    • To change the distance at which points will be grouped together in a cluster, enter a new pixel value in the Cluster radius (px) box.
    • To change the color of the cluster symbol, click the Background color drop-down menu and choose a new color.
    • To change the color of the text on the cluster symbols, click the Text color drop-down menu and choose a new color.

Note:

If you add category values to the Color field well and change the map theme to Clustering, the clusters will display a pie chart showing the ratio of different categories within that cluster. As you zoom in, the cluster is divided into smaller groups, and the pie chart changes to reflect the information in the new cluster. The categories are listed in the Symbol color section, with a default color assigned to each one. To change the color used for a category symbol, click the arrow on the drop-down menu next to a category symbol to display a color palette and choose a new color for the symbol.

Size

To style a map layer proportionally by size, drag a numerical value into the Size field well.

To change the way proportional symbols appear on the map, do the following:

  1. In the Symbology pane, expand the Symbol style category.
  2. To set the Symbol style options, do the following:
    • To change the symbol marker, choose one of the listed shapes. Symbol options are available only for point locations, not polygons.
    • To change the Size parameter of the symbol, move the Symbol size slider to the left (smaller) or to the right (larger), or type a pixel value in the field.
    • Note:

      Point symbols that represent no value are shown on the map and Layers list using the default marker and color.

      To change the symbol's Fill color parameter, click the arrow on the drop-down menu to display a color palette and choose a new fill color for the symbol.
    • To change the symbol's Fill transparency parameter, move the slider to the left (less transparent) or to the right (more transparent), or type a percentage value in the field.
    • To change the symbol's Outline color parameter, click the arrow on the drop-down menu to display the color palette and choose a new outline color for the symbol.
    • To change the symbol's Outline thickness parameter, move the slider to the left (thinner) or to the right (thicker), or type a pixel value in the field.
    • To change the symbol's Outline transparency parameter, move the slider to the left (less transparent) or to the right (more transparent), or type a percentage value in the field.
    • To discard your changes, click Revert to defaults.
  3. In the Symbology pane, expand the Symbol size category.
  4. To change the Symbol size, choose the classification type used to generalize locations on the map:
    • Click the Classification type drop-down menu and choose one of the following:
      • Natural breaks
      • Equal interval
      • Quantile
      • Standard deviation
    • To change the number of classes, type a numeric value in the field or click the up and down arrows.
    • Move the handles on the slider to define the Minimum size and Maximum size values of the proportional symbols.
    • To discard your changes, click Revert to defaults.

Color (numerical)

To style a map layer using a graduated color ramp, drag a numerical value into the Color field well.

Different symbol styling options appear in the pane depending on whether the data in the Color field well is numerical or categorical.

If you placed numerical values in the Color field well, do any of the following to change the map's styling options:

  1. In the Symbology pane, expand the Symbol style category.
  2. To set the Symbol style options, do the following:
    • To change the symbol marker, choose one of the listed shapes. Symbol options are available only for point locations, not polygons.
      Note:

      Point symbols that represent no value are shown on the map and Layers list using the default marker and color.

    • To change the Size parameter of the symbol, move the Symbol size slider to the left (smaller) or to the right (larger), or type a pixel value in the field.
    • To change the symbol's Outline color parameter, click the arrow on the drop-down menu to display the color palette and choose a new color.
    • To change the symbol's Outline thickness parameter, move the slider to left (thinner) or to the right (thicker), or type a pixel value in the field.
    • To change the symbol's Outline transparency parameter, move the slider to the left (less transparent) or to the right (more transparent), or type a percentage value in the field.
    • To discard your changes, click Revert to defaults.
  3. In the Symbology pane, expand the Symbol color category.
  4. To change the Symbol color setting, choose the classification type used to generalize locations on the map:
    • Click the Classification type drop-down menu and choose one of the following:
      • Natural breaks
      • Equal interval
      • Quantile
      • Standard deviation
      • Manual breaks
      • None
    • To change the number of classes, type a numeric value in the field or click the up and down arrows.
    • If you chose None for the classification method, you can change the scheme used to render your symbols by numerical value. Select one of the themes from the Color theme drop-down menu:
      • High to low—Shows the range of values from high to low, using a color ramp ranging from dark to light.
      • Above and below—Shows values above and below a value such as zero or the average.
      • Centered on—Centers on and highlights a particular range of values.
    • To change the colors used to draw on the map, click a color ramp from the available options. To reverse the colors that represent high values and those that represent low values, click the Inverse button Inverse color ramp. Click the button again to reset the color ramp to its original orientation.
    • To change how color is applied to the data, adjust the bounding handles along the color ramp. You can adjust a handle by dragging it or by clicking its label and typing a precise value.
    • To discard your changes, click Revert to defaults.

Color (categories)

To style a map layer using different colors, drag a category value into the Color field well.

Different symbol styling options appear in the pane depending on the whether the data in the Color field well is numerical or categorical.

If you placed category values in the Color field well, do any of the following to change the map's styling options:

  1. In the Symbology pane, expand the Symbol style category.
  2. To set the Symbol style options, do the following:
    • To change the symbol marker, choose one of the listed shapes. Symbol options are available only for point locations, not polygons.
    • To change the Size parameter of the symbol, move the Symbol size slider to the left (smaller) or to the right (larger), or type a pixel value in the field.
    • Note:

      Point symbols that represent no value are shown on the map and Layers list using the default marker and color.

      To change the symbol's Fill color parameter, click the arrow on the drop-down menu to display a color palette and choose a new fill color for the symbol.
    • To change the symbol's Fill transparency parameter, move the slider to the left (less transparent) or to the right (more transparent), or type a percentage value in the field.
    • To change the symbol's Outline color parameter, click the arrow on the drop-down menu to display the color palette and choose a new outline color for the symbol.
    • To change the symbol's Outline thickness parameter, move the slider to the left (thinner) or to the right (thicker), or type a pixel value in the field.
    • To change the symbol's Outline transparency parameter, move the slider to the left (less transparent) or to the right (more transparent), or type a percentage value in the field.
    • To discard your changes, click Revert to defaults.
  3. In the Symbology pane, expand the Symbol color category.
  4. To change the Symbol color options, do the following:
    • To change the colors used to draw the locations, click the color ramp and choose one of the available options. To reverse the order of the colors in the ramp, click the Inverse button Inverse color ramp.
    • Click the arrow on the drop-down menu next to a category symbol to display a color palette and choose a new color for the symbol.
    • To discard your changes, click Revert to defaults.

Size & Color (numerical)

If you filled both the Size and Color field wells in the visualization's field pane with numerical values, you can set different styling options for each value.

  1. In the Symbology pane, click the Size and Color map theme and expand the Symbol style category.
  2. To set the Symbol style options, do the following:
    • To change the symbol marker, choose one of the listed shapes. Symbol options are available only for point locations, not polygons.
    • Note:

      Point symbols that represent no value are shown on the map and Layers list using the default marker and color.

    • To discard your changes, click Revert to defaults.
  3. In the Symbology pane, expand the Symbol size category.
  4. To set the Symbol size options for numerical values, do the following:
    • To change the symbol size, choose the classification type used to generalize locations on the map.
    • To change the number of classes, type a numeric value in the field or click the up and down arrows.
    • Move the handles on the slider to define the Minimum size and Maximum size values of the proportional symbols.
    • To discard your changes, click Revert to defaults.
  5. In the Symbology pane, expand the Symbol color category.
  6. To set the Symbol color options for numerical values, choose the classification type used to generalize locations on the map:
    • Click the Classification type drop-down menu and choose one of the following:
      • Natural breaks
      • Equal interval
      • Quantile
      • Standard deviation
    • To change the number of classes, type a numeric value in the field or click the up and down arrows.
    • If you chose None for the classification method, you can change the scheme used to render your symbols by numerical value. Select one of the themes from the Color theme drop-down menu:
      • High to low—Shows the range of values from high to low, using a color ramp ranging from dark to light.
      • Above and below—Shows values above and below a value such as zero or the average.
      • Centered on—Centers on and highlights a particular range of values.
    • To change the colors used to draw on the map, click a color ramp from the available options. To reverse the colors that represent high values and those that represent low values, click the Inverse button Inverse color ramp. Click the button again to reset the color ramp to its original orientation.
    • To discard your changes, click Revert to defaults.

Size & Color (categories)

If you fill the Size field well with numerical data and the Color field well with categorical data, you can set different styling options for each value.

  1. In the Symbology pane, click the Style & Color map theme and expand the Symbol style category.
  2. To set the Symbol style options for numerical values, do the following:
    • To change the symbol marker, choose one of the listed shapes. Symbol options are available only for point locations, not polygons.
    • Note:

      Point symbols that represent no value are shown on the map in the and Layers list using the default marker and color.

    • To discard your changes, click Revert to defaults.
  3. In the Symbology pane, expand the Symbol size category.
  4. To set the Symbol size options for numerical values, do the following:
    • Click the Classification type drop-down menu and choose one of the following:
      • Natural breaks
      • Equal interval
      • Quantile
      • Standard deviation
    • To change the number of classes, type a numeric value in the field or click the up and down arrows.
    • Move the handles on the slider to define the Minimum size and Maximum size values of the proportional symbols.
    • To discard your changes, click Revert to defaults.
  5. In the Symbology pane, expand the Symbol color category.
  6. To set the Symbol color options for each category, do the following:
    • To change the colors used to draw the locations, click the color ramp and choose one of the available options. To reverse the order of the colors in the ramp, click the Inverse button Inverse color ramp.
    • Click the arrow on the drop-down menu next to a category symbol to display a color palette and choose a new color for the symbol.
    • To discard your changes, click Revert to defaults.

Filter null values

In some cases, when you style your map using color or size, the attributes of some locations have a null value, or no value. This means that the locations are missing data or are out of range and cannot be grouped into classifications that you've specified for the layer, such as grouping locations by size.

By default, point symbols that represent no value are displayed on the map using the default symbol and color. You can filter these values so that they do not appear on the map.

To filter symbols with no value, follow these steps:

  1. If necessary, click the ArcGIS for Power BI visualization to activate it.

    For example, the following map shows two locations that are out of range of the specified classifications; these locations appear as blue circles on the map.

    Map showing two null value locations that can't be classified
  2. Expand the Power BI Filters pane.
  3. In the Filters pane, locate the attribute used to style the map layer and expand its category.
  4. From the Show items when the value drop-down menu, choose is not blank.
    Filter items that have no value.

    The map updates; locations with no value do not appear on the map.

    Locations with no value do not appear on the map.