> ## Documentation Index
> Fetch the complete documentation index at: https://wundergraphinc-brendan-add-sof-link.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://mintcdn.com/wundergraphinc-brendan-add-sof-link/znnH7GFKh4R4ntTv/images/studio/employee-query-in-graphiql-playground.png?fit=max&auto=format&n=znnH7GFKh4R4ntTv&q=85&s=b9c41e60473fdf9abb48caddc577ee59" alt="GraphiQL playground employee query with data visualization in WunderGraph" title="Employee query in GraphiQL playground" width="2304" height="1406" data-path="images/studio/employee-query-in-graphiql-playground.png" />
</Frame>

The playground is enhanced with visual representations of the query execution plan along with details like timings, inputs, and 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://mintcdn.com/wundergraphinc-brendan-add-sof-link/lp_f9DXOip40YgZM/images/studio/parallel-queries-for-employees-and-products.png?fit=max&auto=format&n=lp_f9DXOip40YgZM&q=85&s=78fec29849f930a27d0b0c328aa21bf8" alt="GraphiQL playground parallel queries for employees and products with timing visualization" title="Parallel queries for employees and products" width="2304" height="1406" data-path="images/studio/parallel-queries-for-employees-and-products.png" />
</Frame>