diff --git a/doc/user-manual/fpakc_UserManual.tex b/doc/user-manual/fpakc_UserManual.tex
index 1b76168..114dccf 100644
--- a/doc/user-manual/fpakc_UserManual.tex
+++ b/doc/user-manual/fpakc_UserManual.tex
@@ -517,60 +517,67 @@ make
                 \item \textbf{reflection}: Elastic reflection of particles.
                 \item \textbf{absorption}: Particle is eliminated from the domain.
                   The particle is first moved into the edge and its properties are scattered among the edge nodes.
-                \item \textbf{transparent}: Particle abandon the numerical domain.
+                \item \textbf{transparent}: Particle abandon the numerical domain.                  
+                \item \textbf{axis}: Identifies the symmetry axis for 2D cylindrical simulations.
+                  If , for some reason, a particle interacts with this axis, it is reflected.
                 \item \textbf{wallTemperature}: Reflective wall with constant temperature that exchange heat with particles.
                 Required parameters are:
-                \begin{itemize}
-                  \item \textbf{temperature}: Real.
-                    Units of $\unit{K}$.
-                    Temperature wall.
-                  \item \textbf{specificHeat}: Real.
-                     Units of $\unit{J kg^{-1} K^{-1}}$.
-                     Specific heat capacity of the material.
-                \end{itemize}
+                
+                \textbf{temperature}: Real.
+                  Units of $\unit{K}$.
+                  Temperature wall.
+                  
+                \textbf{specificHeat}: Real.
+                   Units of $\unit{J kg^{-1} K^{-1}}$.
+                   Specific heat capacity of the material.
+                   
                 \item \textbf{ionization}: Per each particle crossing the surface with this type of boundary, a number of ionization events are calculated.
                   A pair of ion-electron is generated for each ionization event, taking as a reference a neutral background.
                   The secondary electron is taken as the same type as the incident particle.
                   The available input is:
-                  \begin{itemize}
-                    \item \textbf{neutral}: Object.
-                      Information about the neutral background.
-                      Required parameters are:
-                      \begin{itemize}
-                        \item \textbf{ion}: Character.
-                          Species name of the ion generated as defined in object \textbf{species}.
-                          Required parameter.
-                        \item \textbf{mass}: Real.
-                          Units in $\unit{kg}$.
-                          Mass of neutral species.
-                          If missing, the mass of the ion is used
-                        \item \textbf{density}: Real.
-                          Units in $\unit{m^{-3}}$.
-                          Density of neutral background.
-                          Required parameter.
-                        \item \textbf{velocity}: Real.
-                          Units in $\unit{m s^{-1}}$.
-                          Array of dimension $3$.
-                          Mean velocity of neutral background.
-                          Required parameter.
-                        \item \textbf{temperature}: Real.
-                          Units in $\unit{K}$.
-                          Temperature of neutral background.
-                          Required parameter.                        
-                      \end{itemize}
-                    \item \textbf{effectiveTime}: Real.
-                      Units in $\unit{s}$.
-                      As the particle is no longer simulated once it crossed the boundary, this time represents the effective time in which the particle produces ionization processes in the neutral background.
-                      Required parameter.
-                    \item \textbf{energyThreashold}: Real.
-                      Units in $\unit{eV}$.
-                      Ionization energy threshold for the simulated process.
-                      Required parameter.
-                    \item \textbf{crossSection}: Character.
-                      Complete path to the cross-section data for the ionization process.                         
-                  \end{itemize}
-                \item \textbf{axis}: Identifies the symmetry axis for 2D cylindrical simulations.
-                  If , for some reason, a particle interacts with this axis, it is reflected.
+                  
+                  \textbf{neutral}: Object.
+                    Information about the neutral background.
+                    Required parameters are:
+                    \begin{itemize}
+                      \item \textbf{ion}: Character.
+                        Species name of the ion generated as defined in object \textbf{species}.
+                        Required parameter.
+                      \item \textbf{mass}: Real.
+                        Units in $\unit{kg}$.
+                        Mass of neutral species.
+                        If missing, the mass of the ion is used
+                      \item \textbf{density}: Real.
+                        Units in $\unit{m^{-3}}$.
+                        Density of neutral background.
+                        Required parameter.
+                      \item \textbf{velocity}: Real.
+                        Units in $\unit{m s^{-1}}$.
+                        Array of dimension $3$.
+                        Mean velocity of neutral background.
+                        Required parameter.
+                      \item \textbf{temperature}: Real.
+                        Units in $\unit{K}$.
+                        Temperature of neutral background.
+                        Required parameter.                        
+                    \end{itemize}
+                    
+                  \textbf{effectiveTime}: Real.
+                    Units in $\unit{s}$.
+                    As the particle is no longer simulated once it crossed the boundary, this time represents the effective time in which the particle produces ionization processes in the neutral background.
+                    Required parameter.
+                    
+                  \textbf{energyThreashold}: Real.
+                    Units in $\unit{eV}$.
+                    Ionization energy threshold for the simulated process.
+                    Required parameter.
+                    
+                  \textbf{electronSecondary}. Character.
+                    Name of the species for the secondary electrons produced.
+                    I none is provided, the input species is used.
+                    
+                  \textbf{crossSection}: Character.
+                    Complete path to the cross-section data for the ionization process.
             \end{itemize}
           \end{itemize}
           \item \textbf{EM}.