Phoenix does not currently support adding fully custom columns to the annotations view in the UI; only configured annotation types (categorical, continuous, freeform) and certain metadata (like user, source, etc.) are supported as columns. Custom attributes or metadata sent with annotations (e.g., arbitrary keys) are not automatically rendered as new columns in the UI, though they may be stored and accessible via API or export functions. See <https://arize.com/docs/phoenix/tracing/how-to-tracing/feedback-and-annotations/annotating-in-the-ui|Annotating in the UI> and related <https://github.com/Arize-ai/phoenix/issues/1852|GitHub issues>.
You can configure which annotation types appear as columns by setting up annotation configs in the project settings, but arbitrary custom fields beyond these are not currently supported for display as columns. For more advanced needs, exporting data and visualizing it externally is recommended. Would you like more detail on configuring annotation columns or exporting annotation data?
Sources:
- <https://github.com/Arize-ai/phoenix/issues/1852|GitHub Issue: custom attributes on spans>
- <https://arize.com/docs/phoenix/tracing/how-to-tracing/feedback-and-annotations/annotating-in-the-ui|Annotating in the UI>
