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diff --git a/docs/users_guide.pdf b/docs/users_guide.pdf
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diff --git a/docs/users_guide.tex b/docs/users_guide.tex
index 548d666b0afddcd8d1addc685a2e25810730fc3e..fd7664dcbc8d788c30e9acbbf8c839d25ba6ce1a 100644
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+++ b/docs/users_guide.tex
@@ -457,9 +457,11 @@ give significant speedup \\
\hline
\emph{accum\_end} & The date and time for finishing accumulating fluxes \\
\hline
-\emph{ngrid\_out} & the number of output levels for vertical water temperature profiles: -1 -- use numerical grid levels; $> 0$ -- use ngrid\_out levels (in meters) given below \\
+\emph{ngrid\_out} & the number of output levels for vertical water temperature profiles, the depths of levels (in meters, in respect to water surface) are given below \\
\hline
-\emph{ngridsoil\_out} & the number of output levels for vertical soil temperature profiles: -1 -- use numerical grid levels; $> 0$ -- use ngridsoil\_out levels (in meters) given below \\
+\emph{ngridice\_out} & the number of output levels for vertical ice temperature profiles, the depths of levels (in meters, in respect to ice surface) are given below \\
+\hline
+\emph{ngridsoil\_out} & the number of output levels for vertical soil temperature profiles, the depths of levels (in meters, in respect to sediments surface) are given below \\
\hline
\emph{rtemp} & the number of locations for scalars (temperature, CH$_4$, ...) output, followed by triples (x,y,z) of respective coordinates; x and y relative to a lake center, and z measured from the lake top \\
\hline