> ## Documentation Index
> Fetch the complete documentation index at: https://wundergraphinc-brendan-add-external-directive.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Playground++

> Enhanced GraphiQL with Advanced Request Tracing to test and optimize your queries

<Frame caption="Enhanced GraphiQL Playground">
  <img src="https://mintlify.s3.us-west-1.amazonaws.com/wundergraphinc-brendan-add-external-directive/images/studio/image-15.png" />
</Frame>

The playground is enchanced with visual representations of the query execution plan along with details like timings, inputs outputs for each subgraph and much more. The `X-WG-TRACE` header must be included to enable the visualization. It is available in 2 modes tree view and waterfall view.

<Info>
  For more information about Advanced Request Tracing (ART) click [here](/router/advanced-request-tracing-art)
</Info>

<Frame caption="Waterfall View">
  <img src="https://mintlify.s3.us-west-1.amazonaws.com/wundergraphinc-brendan-add-external-directive/images/studio/image-16.png" />
</Frame>