diff --git a/doc/handbook/5_structure.tex b/doc/handbook/5_structure.tex
index a184e8a8434e8865058c4416973dea60cf5bd68f..76626670c035382a6fa61c2c94921ffbe6e2d8e4 100644
--- a/doc/handbook/5_structure.tex
+++ b/doc/handbook/5_structure.tex
@@ -87,7 +87,7 @@
   [.\node[FirstLevel] {freeflow};
     [.\node[SecondLevel] {\emph{models}};
       \node[ThirdLevel] {Single-phase free flow models using Navier-Stokes
-                         and eddy-viscosity based Reynolds-averaged Navier-Stokes turbulence models.};
+                         and eddy-viscosity based Reynolds-averaged Navier-Stokes turbulence models and shallow water equation model.};
     ]
   ]
   [.\node[FirstLevel] {geomechanics};
diff --git a/doc/handbook/6_inputoutput.tex b/doc/handbook/6_inputoutput.tex
index e36489c8e8c3bc98136b357c369d5b0a540de303..3d7c5c693bb29371a1cce8e89f2392262c6e15c9 100644
--- a/doc/handbook/6_inputoutput.tex
+++ b/doc/handbook/6_inputoutput.tex
@@ -39,7 +39,8 @@ Furthermore, petrophysical properties can be defined (for each cell), by using e
 An example can be found in \texttt{dumux/test\allowbreak/porousmediumflow/2p/implicit/cornerpoint}.
 
 \subsubsection{VTK file format}
-
+VTK format uses ASCII and XML format. It is mostly used by \Dumux for output purposes and can be visualized by programs such as Paraview. Using VTK files to input grid and parameter data is also possible.
+An example can be found in \texttt{dumux/test\allowbreak/io/gridmanager}.
 
 \subsubsection{Other Grid Formats}
 Grid formats other than DGF, MSH, GRDECL, or VTK will have to be converted to the DGF, MSH, GRDECL, or VTK format before they can be used in \Dumux.