diff --git a/doc/user-manual/fpakc_UserManual.tex b/doc/user-manual/fpakc_UserManual.tex
index c2dfd9e..b1dd6dd 100644
--- a/doc/user-manual/fpakc_UserManual.tex
+++ b/doc/user-manual/fpakc_UserManual.tex
@@ -398,6 +398,9 @@ make
                                   Trigger between writings is the same as in \textbf{triggerOutput}.
           \item \textbf{EMField}: Logical.
                                   Determines if the electromagnetic field is printed.
+          \item \textbf{bounraiesParticle}: Logical.
+                                            Determines if the properties of the boundaries are written.
+                                            \textit{Warning}: Not all particle models produce this output, only those whose properties change during the simulation.
           \item \textbf{probes}: Array of objects.
                                  Defines the probes employed for obtaining the distribution function at specific positions.
                                  See Sec.~\ref{sec:probing} for more information.