> ## Documentation Index
> Fetch the complete documentation index at: https://cubed3-igor-cub-2940-docs-small-multiples.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Series mapping

> Assign query columns to chart channels — X axis, Y axis, color, size, and tooltips.

Series mapping controls which query columns are assigned to which chart channels. This is done in the **Fields** tab of the chart configuration panel.

## Chart channels

| Channel         | Description                                                                                                                                      | Applicable chart types                     |
| --------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------ |
| **X**           | The horizontal axis dimension or time field                                                                                                      | Bar, line, area, scatter, heatmap, boxplot |
| **Y**           | The vertical axis measure                                                                                                                        | Bar, line, area, scatter, boxplot          |
| **Color**       | Creates one series per unique value; controls stacking behavior                                                                                  | All Vega-based types                       |
| **Size**        | Scales point radius by a numeric measure                                                                                                         | Scatter, map                               |
| **Split by**    | Repeats the chart once per unique value, as a grid of panels — see [small multiples](/docs/explore-analyze/charts/configuration/small-multiples) | Bar, line, area, scatter                   |
| **Tooltip**     | Fields shown on hover                                                                                                                            | All types                                  |
| **Theta** (pie) | The measure that determines slice size                                                                                                           | Pie                                        |

## Assigning fields

Drag a field from the **Available fields** list at the bottom of the Fields tab into the target channel slot. You can also drag an already-assigned field between channels.

Fields can appear in more than one channel simultaneously — drag from **Available fields** to add a field to a second channel without removing it from the first. For example, you can assign the same dimension to both the X axis and the tooltip.

## Multiple measures on Y

To plot multiple measures as separate series, drag additional measures into the **Y** channel. Each measure renders as its own series, with independent color and style settings in [series configuration](/docs/explore-analyze/charts/configuration/series-configuration).

## Removing a field

Drag a field out of its channel slot back to **Available fields**, or click the **×** on the field token to remove it.