The latest version of the complete MODFLOW 6 input output guide can be found here.
.. toctree:: :maxdepth: 1 :glob: _mf6io/sim-*
.. toctree:: :maxdepth: 1 :glob: _mf6io/sln-ims*
.. toctree:: :maxdepth: 1 :glob: _mf6io/gwf-*
.. toctree:: :maxdepth: 1 :glob: _mf6io/gwt-*
.. toctree:: :maxdepth: 1 :glob: _mf6io/exg-*
.. toctree:: :maxdepth: 1 :glob: _mf6io/utl-*