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
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.

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.