> ## Documentation Index
> Fetch the complete documentation index at: https://docs.graphext.com/llms.txt
> Use this file to discover all available pages before exploring further.

# configure_column_metadata

> Configures the label and/or description of a column. 

Sets a human-readable label, description, and/or number format for a column. The `label` replaces the column name in the UI. The `description` appears as a tooltip. The `format` uses d3-format syntax for number display (e.g. `",.2f"` for two decimal places with thousands separator).

This is a UI configuration step that affects how the project is displayed in Graphext. It applies to the dataset referenced in its inputs. If your recipe produces multiple datasets (e.g. a filtered dataset that is then passed to create\_project alongside the original), you need to add separate configure steps for each dataset you want to configure.

## Usage

The following example shows how the step can be used in a recipe.

<Accordion title="Examples" icon="code" defaultOpen="true">
  <Tabs>
    <Tab title="Example 1">
      ```stan theme={null}
      configure_column_metadata(ds.avatar, { "label": "Photo", "description": "Profile image of a user" })
      ```
    </Tab>

    <Tab title="Signature">
      General syntax for using the step in a recipe. Shows the inputs and outputs the step is expected to receive and will produce respectively. For futher details see sections below.

      ```stan theme={null}
      configure_column_metadata(column: column, {
          "param": value,
          ...
      })
      ```
    </Tab>
  </Tabs>
</Accordion>

## Inputs & Outputs

The following are the inputs expected by the step and the outputs it produces. These are generally
columns (`ds.first_name`), datasets (`ds` or `ds[["first_name", "last_name"]]`) or models (referenced
by name e.g. `"churn-clf"`).

<Accordion title="Inputs" icon="right-to-bracket">
  <ParamField path="column" type="column" required>
    Column to be configured.
  </ParamField>
</Accordion>

<Accordion title="Outputs" icon="right-from-bracket" />

## Configuration

The following parameters can be used to configure the behaviour of the step by including them in
a json object as the last "input" to the step, i.e. `step(..., {"param": "value", ...}) -> (output)`.

<Accordion title="Parameters" defaultOpen="true" icon="sliders">
  <ParamField path="label" type="string">
    Label of the column.
  </ParamField>

  <ParamField path="description" type="string">
    Description of the column.
  </ParamField>

  <ParamField path="format" type="string">
    Format the column's numbers using d3-format (e.g., ',.3f' will format the number with 3 decimal places).
  </ParamField>
</Accordion>