diff --git a/docs/pdf/datastruct.tex b/docs/pdf/datastruct.tex
index d0221597..547c1505 100644
--- a/docs/pdf/datastruct.tex
+++ b/docs/pdf/datastruct.tex
@@ -281,26 +281,28 @@ like Diagonal Scaling or Block Jacobi with incomplete
 factorization ILU(0). 
 
  A preconditioner is held in the \hypertarget{precdata}{{\tt
-    psb\_prec\_type}} data structure which depends on the
-\verb|psb_base_prec| reported in 
-figure~\ref{fig:prectype}. The \verb|psb_base_prec| 
+    psb\_prec\_type}} data structure reported in 
+figure~\ref{fig:prectype}. The \verb|psb_prec_type| 
 data type may contain a simple preconditioning matrix with the
-associated communication descriptor which may be different than the
-system communication descriptor in the case of parallel
-preconditioners like the Additive Schwarz one. Then the
-\verb|psb_prec_type| may contain more than one preconditioning matrix
-like in the case of Two-Level (in general Multi-Level) preconditioners.
-The user can choose the type of preconditioner to be used by means of
-the \verb|psb_precset| subroutine; once the type of preconditioning
-method is specified, along with all the parameters that characterize
-it, the preconditioner data structure can be built using the
-\verb|psb_precbld| subroutine.
-This data structure wants to be flexible enough to easily allow the
-implementation of new kind of preconditioners. The values contained in
+associated communication descriptor.%%  which may be different than the
+%% system communication descriptor in the case of parallel
+%% preconditioners like the Additive Schwarz one. Then the
+%% \verb|psb_prec_type| may contain more than one preconditioning matrix
+%% like in the case of Two-Level (in general Multi-Level) preconditioners.
+%% The user can choose the type of preconditioner to be used by means of
+%% the \verb|psb_precset| subroutine; once the type of preconditioning
+%% method is specified, along with all the parameters that characterize
+%% it, the preconditioner data structure can be built using the
+%% \verb|psb_precbld| subroutine.
+%% This data structure wants to be flexible enough to easily allow the
+%% implementation of new kind of preconditioners.
+The values contained in
 the \verb|iprcparm| and \verb|dprcparm| define tha type of
 preconditioner along with all the parameters related to it; thus,
 \verb|iprcparm| and \verb|dprcparm| define how the other records have
-to be interpreted.
+to be interpreted. This data structure is the basis of ore complex
+preconditioning strategies, which are the subject of further
+research. 
 \begin{figure}[h!]
   \small
   \begin{Sbox}
diff --git a/docs/pdf/intro.tex b/docs/pdf/intro.tex
index 0e73a271..fe86bceb 100644
--- a/docs/pdf/intro.tex
+++ b/docs/pdf/intro.tex
@@ -197,8 +197,7 @@ local rows)  is $|{\cal I}_i| + |{\cal B}_i| +|{\cal H}_i|$.
 
 \begin{figure}[h] 
 \begin{center}
-\leavevmode
-\rotatebox{-90}{\includegraphics[scale=0.45]{figures/points}}
+\rotatebox{-90}{\includegraphics[scale=0.65]{figures/points}}
 \end{center}
 \caption{Point classfication.\label{fig:points}}
 \end{figure}
@@ -249,7 +248,8 @@ internally defined in the PSBLAS software package:
   \begin{itemize}
   \item \verb|ge|: the routine is related to dense data, 
   \item \verb|sp|: the routine is related to sparse data, 
-  \item \verb|cd|: the routine is related to communication descriptor (see~\ref{sec:datastruct}).
+  \item \verb|cd|: the routine is related to communication descriptor
+        (see~\ref{sec:datastruct}).
   \end{itemize}
   For example the \verb|psb_geins|, \verb|psb_spins| and
   \verb|psb_cdins| perform the same action (see~\ref{sec:toolsrout}) on
diff --git a/docs/pdf/precs.tex b/docs/pdf/precs.tex
index af4bcbcb..8ec2ab48 100644
--- a/docs/pdf/precs.tex
+++ b/docs/pdf/precs.tex
@@ -180,7 +180,7 @@ An integer value; 0 means no error has been detected.
 \subroutine{psb\_precaply}{Preconditioner application routine}
 
 \syntax{call psb\_precaply}{prec,x,y,desc\_a,info,trans,work}
-\syntax{call psb\_precaply}{prec,x,desc\_a,info,trans}
+\syntax*{call psb\_precaply}{prec,x,desc\_a,info,trans}
 
 \begin{description}
 \item[\bf On Entry]
diff --git a/docs/pdf/toolsrout.tex b/docs/pdf/toolsrout.tex
index 42a8f0dc..7dbd95d4 100644
--- a/docs/pdf/toolsrout.tex
+++ b/docs/pdf/toolsrout.tex
@@ -8,8 +8,8 @@
 \subroutine{psb\_cdall}{Allocates a communication descriptor}
 
 \syntax{call psb\_cdall}{icontxt, desc\_a, info,mg=mg,parts=parts}
-\syntax{call psb\_cdall}{icontxt, desc\_a, info,vg=vg,flag=flag}
-\syntax{call psb\_cdall}{icontxt, desc\_a, info,vl=vl}
+\syntax*{call psb\_cdall}{icontxt, desc\_a, info,vg=vg,flag=flag}
+\syntax*{call psb\_cdall}{icontxt, desc\_a, info,vl=vl}
 
 This subroutine initializes the communication descriptor associated
 with an index space. Exactly one of the  optional arguments
@@ -72,8 +72,8 @@ An integer value; 0 means no error has been detected.
   The subroutine must conform to the following interface: 
 \begin{verbatim}
   interface 
-     subroutine psb_parts(glob_index,nrow,np,pv,nv)
-       integer, intent (in)  :: glob_index,np,nrow
+     subroutine psb_parts(glob_index,mg,np,pv,nv)
+       integer, intent (in)  :: glob_index,np,mg
        integer, intent (out) :: nv, pv(*)
      end subroutine psb_parts
   end interface
@@ -82,7 +82,7 @@ An integer value; 0 means no error has been detected.
   \begin{description}
     \item[glob\_index] The global index to be mapped;
     \item[np] The number of processes in the mapping;
-    \item[nrow] The total number of global rows in the mapping;
+    \item[mg] The total number of global rows in the mapping;
   \end{description}
   The output arguments are:
   \begin{description}
@@ -267,7 +267,7 @@ Specified as: a structured data of type \spdata.
 Scope:{\bf global}.\\
 Type:{\bf required}.\\
 Specified as: an integer value $nl\ge 0$. 
-\item[extype] the kiond of estension required.\\
+\item[extype] the kind of estension required.\\
 Scope:{\bf global}.\\
 Type:{\bf optional }.\\
 Specified as: an integer value
diff --git a/docs/pdf/userguide.tex b/docs/pdf/userguide.tex
index 7e59e671..753b3b18 100644
--- a/docs/pdf/userguide.tex
+++ b/docs/pdf/userguide.tex
@@ -13,7 +13,6 @@
             linkcolor=blue]{hyperref}
 \usepackage{ifthen}
 \usepackage{graphicx}
-
 \newtheorem{theorem}{Theorem}
 \newtheorem{corollary}{Corollary}