steps. If ``NO_DEFAULT_PATH`` is specified all ``NO_*`` options are
enabled.
-1. Search paths specified in the ``PackageName_ROOT`` CMake and environment
- variables. The package root variables are maintained as a stack so if
+1. Search paths specified in the :variable:`<PackageName>_ROOT` CMake
+ variable and the :envvar:`<PackageName>_ROOT` environment variable,
+ where ``<PackageName>`` is the package to be found.
+ The package root variables are maintained as a stack so if
called from within a find module, root paths from the parent's find
module will also be searched after paths for the current package.
This can be skipped if ``NO_PACKAGE_ROOT_PATH`` is passed.