# Building documentation

```{tip}
For complete build instructions see [here](build.md).
```

The following targets are used to build documentation for VTK:

  * `DoxygenDoc` - build the doxygen documentation from VTK's C++ source files
  (`VTK_BUILD_DOCUMENTATION` needs to be `ON` for the target to exist).
  * `SphinxDoc` - build the sphinx documentation for VTK.
  (`VTK_BUILD_SPHINX_DOCUMENTATION` needs to be `ON` for the target to exist).
