# Debugging
If a VegaFusion visualization does not do what you expect (e.g. does not match the behavior of regular Altair), please [let us know](https://github.com/hex-inc/vegafusion/issues).

In addition, here are some things you can do to get more insight into what VegaFusion is doing.

```{toctree}
:maxdepth: 1
planner_results
verbosity
```