diff --git a/docs/amg4psblas_1.0-guide.pdf b/docs/amg4psblas_1.0-guide.pdf
index e18bf1b2..2303b96c 100644
Binary files a/docs/amg4psblas_1.0-guide.pdf and b/docs/amg4psblas_1.0-guide.pdf differ
diff --git a/docs/html/userhtmlse6.html b/docs/html/userhtmlse6.html
index a88178d2..18de118a 100644
--- a/docs/html/userhtmlse6.html
+++ b/docs/html/userhtmlse6.html
@@ -73,14 +73,42 @@ class="cmr-12">routine as in the following:</span>
      <div class="center" 
 >
 <!--l. 26--><p class="noindent" >
-<!--l. 27--><p class="noindent" ><span class="obeylines-h"><span class="verb"><span 
+<!--l. 27--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">call</span><span 
-class="cmtt-12">&#x00A0;p%set(smoother,info</span><span 
-class="cmtt-12">&#x00A0;[,ilev,ilmax,pos])</span></span></span><br />
-<span class="obeylines-h"><span class="verb"><span 
+class="cmtt-12">&#x00A0;</span><span 
+class="cmtt-12">p</span><span 
+class="cmtt-12">%</span><span 
+class="cmtt-12">set</span><span 
+class="cmtt-12">(</span><span 
+class="cmtt-12">smoother</span><span 
+class="cmtt-12">,</span><span 
+class="cmtt-12">info</span><span 
+class="cmtt-12">&#x00A0;</span><span 
+class="cmtt-12">[,</span><span 
+class="cmtt-12">ilev</span><span 
+class="cmtt-12">,</span><span 
+class="cmtt-12">ilmax</span><span 
+class="cmtt-12">,</span><span 
+class="cmtt-12">pos</span><span 
+class="cmtt-12">])</span><br />
+<span class="lstinline"></span><span 
 class="cmtt-12">call</span><span 
-class="cmtt-12">&#x00A0;p%set(solver,info</span><span 
-class="cmtt-12">&#x00A0;[,ilev,ilmax,pos])</span></span></span></div>
+class="cmtt-12">&#x00A0;</span><span 
+class="cmtt-12">p</span><span 
+class="cmtt-12">%</span><span 
+class="cmtt-12">set</span><span 
+class="cmtt-12">(</span><span 
+class="cmtt-12">solver</span><span 
+class="cmtt-12">,</span><span 
+class="cmtt-12">info</span><span 
+class="cmtt-12">&#x00A0;</span><span 
+class="cmtt-12">[,</span><span 
+class="cmtt-12">ilev</span><span 
+class="cmtt-12">,</span><span 
+class="cmtt-12">ilmax</span><span 
+class="cmtt-12">,</span><span 
+class="cmtt-12">pos</span><span 
+class="cmtt-12">])</span></div>
      </li>
      <li class="itemize"><span 
 class="cmr-12">link the code implementing the various methods into the application</span>
@@ -143,10 +171,13 @@ cellspacing="0" cellpadding="0"
 id="TBL-21-1"><col 
 id="TBL-21-2"></colgroup><tr  
  style="vertical-align:baseline;" id="TBL-21-1-"><td  style="white-space:wrap; text-align:left;" id="TBL-21-1-1"  
-class="td11"><!--l. 58--><p class="noindent" ><span class="obeylines-h"><span class="verb"><span 
-class="cmtt-12">smoother</span></span></span> </td><td  style="white-space:wrap; text-align:left;" id="TBL-21-1-2"  
-class="td11"><!--l. 58--><p class="noindent" ><span class="obeylines-h"><span class="verb"><span 
-class="cmtt-12">class(amg_x_base_smoother_type)</span></span></span>                        </td>
+class="td11"><!--l. 58--><p class="noindent" ><span class="lstinline"></span><span 
+class="cmtt-12">smoother</span> </td><td  style="white-space:wrap; text-align:left;" id="TBL-21-1-2"  
+class="td11"><!--l. 58--><p class="noindent" ><span class="lstinline"></span><span 
+class="cmtt-12">class</span><span 
+class="cmtt-12">(</span><span 
+class="cmtt-12">amg_x_base_smoother_type</span><span 
+class="cmtt-12">)</span>                        </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-21-2-"><td  style="white-space:wrap; text-align:left;" id="TBL-21-2-1"  
 class="td11"><!--l. 59--><p class="noindent" >       </td><td  style="white-space:wrap; text-align:left;" id="TBL-21-2-2"  
@@ -156,10 +187,13 @@ class="cmr-12">The   user-defined   new   smoother   to   be   employed   in   t
 class="cmr-12">preconditioner.</span>                                                                    </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-21-3-"><td  style="white-space:wrap; text-align:left;" id="TBL-21-3-1"  
-class="td11"><!--l. 61--><p class="noindent" ><span class="obeylines-h"><span class="verb"><span 
-class="cmtt-12">solver</span></span></span> </td><td  style="white-space:wrap; text-align:left;" id="TBL-21-3-2"  
-class="td11"><!--l. 61--><p class="noindent" ><span class="obeylines-h"><span class="verb"><span 
-class="cmtt-12">class(amg_x_base_solver_type)</span></span></span>                          </td>
+class="td11"><!--l. 61--><p class="noindent" ><span class="lstinline"></span><span 
+class="cmtt-12">solver</span> </td><td  style="white-space:wrap; text-align:left;" id="TBL-21-3-2"  
+class="td11"><!--l. 61--><p class="noindent" ><span class="lstinline"></span><span 
+class="cmtt-12">class</span><span 
+class="cmtt-12">(</span><span 
+class="cmtt-12">amg_x_base_solver_type</span><span 
+class="cmtt-12">)</span>                          </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-21-4-"><td  style="white-space:wrap; text-align:left;" id="TBL-21-4-1"  
 class="td11"><!--l. 62--><p class="noindent" >       </td><td  style="white-space:wrap; text-align:left;" id="TBL-21-4-2"  
@@ -199,7 +233,7 @@ class="cmr-12">pass it as follows:</span>
 &#x00A0;<br />&#x00A0;&#x00A0;call&#x00A0;prec%smoothers_build(a,desc_a,info)
 &#x00A0;<br />
 </div>
-<!--l. 88--><p class="nopar" >
+<!--l. 107--><p class="nopar" >
                                                                                
 
                                                                                
diff --git a/docs/html/userhtmlsu14.html b/docs/html/userhtmlsu14.html
index 6424ddd1..1abdf5b8 100644
--- a/docs/html/userhtmlsu14.html
+++ b/docs/html/userhtmlsu14.html
@@ -46,6 +46,12 @@ class="cmtt-12">,</span><span
 class="cmtt-12">&#x00A0;</span><span 
 class="cmtt-12">[</span><span 
 class="cmtt-12">iout</span><span 
+class="cmtt-12">,</span><span 
+class="cmtt-12">&#x00A0;</span><span 
+class="cmtt-12">root</span><span 
+class="cmtt-12">,</span><span 
+class="cmtt-12">&#x00A0;</span><span 
+class="cmtt-12">verbosity</span><span 
 class="cmtt-12">])</span><br />
 </div>
 <!--l. 763--><p class="noindent" ><span 
@@ -71,7 +77,7 @@ id="TBL-16-1"><col
 id="TBL-16-2"></colgroup><tr  
  style="vertical-align:baseline;" id="TBL-16-1-"><td  style="white-space:wrap; text-align:left;" id="TBL-16-1-1"  
 class="td11"><!--l. 771--><p class="noindent" ><span class="lstinline"></span><span 
-class="cmtt-12">info</span>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-1-2"  
+class="cmtt-12">info</span>      </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-1-2"  
 class="td11"><!--l. 771--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">integer</span><span 
 class="cmtt-12">,</span><span 
@@ -80,20 +86,20 @@ class="cmtt-12">intent</span><span
 class="cmtt-12">(</span><span 
 class="cmtt-12">out</span><span 
 class="cmtt-12">)</span><span 
-class="cmr-12">.</span>                                                       </td>
+class="cmr-12">.</span>                                                </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-16-2-"><td  style="white-space:wrap; text-align:left;" id="TBL-16-2-1"  
-class="td11"><!--l. 772--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-2-2"  
+class="td11"><!--l. 772--><p class="noindent" >           </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-2-2"  
 class="td11"><!--l. 772--><p class="noindent" ><span 
 class="cmr-12">Error code. If no error, 0 is returned. See Section</span><span 
 class="cmr-12">&#x00A0;</span><a 
 href="userhtmlse7.html#x26-300007"><span 
 class="cmr-12">7</span><!--tex4ht:ref: sec:errors --></a> <span 
-class="cmr-12">for details.</span>     </td>
+class="cmr-12">for details.</span></td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-16-3-"><td  style="white-space:wrap; text-align:left;" id="TBL-16-3-1"  
 class="td11"><!--l. 773--><p class="noindent" ><span class="lstinline"></span><span 
-class="cmtt-12">iout</span>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-3-2"  
+class="cmtt-12">iout</span>       </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-3-2"  
 class="td11"><!--l. 773--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">integer</span><span 
 class="cmtt-12">,</span><span 
@@ -104,21 +110,71 @@ class="cmtt-12">in</span><span
 class="cmtt-12">),</span><span 
 class="cmtt-12">&#x00A0;</span><span 
 class="cmtt-12">optional</span><span 
-class="cmr-12">.</span>                                         </td>
+class="cmr-12">.</span>                                 </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-16-4-"><td  style="white-space:wrap; text-align:left;" id="TBL-16-4-1"  
-class="td11"><!--l. 774--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-4-2"  
+class="td11"><!--l. 774--><p class="noindent" >           </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-4-2"  
 class="td11"><!--l. 774--><p class="noindent" ><span 
-class="cmr-12">The  id  of  the  file  where  the  preconditioner  description  will  be</span>
+class="cmr-12">The id of the file where the preconditioner description will be</span>
 <span 
-class="cmr-12">printed; the default is the standard output.</span>                              </td>
+class="cmr-12">printed; the default is the standard output.</span>                       </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-16-5-"><td  style="white-space:wrap; text-align:left;" id="TBL-16-5-1"  
-class="td11">      </td> </tr></table></div>
+class="td11"><!--l. 776--><p class="noindent" ><span class="lstinline"></span><span 
+class="cmtt-12">root</span>       </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-5-2"  
+class="td11"><!--l. 776--><p class="noindent" ><span class="lstinline"></span><span 
+class="cmtt-12">integer</span><span 
+class="cmtt-12">,</span><span 
+class="cmtt-12">&#x00A0;</span><span 
+class="cmtt-12">intent</span><span 
+class="cmtt-12">(</span><span 
+class="cmtt-12">in</span><span 
+class="cmtt-12">),</span><span 
+class="cmtt-12">&#x00A0;</span><span 
+class="cmtt-12">optional</span><span 
+class="cmr-12">.</span>                                 </td>
+</tr><tr  
+ style="vertical-align:baseline;" id="TBL-16-6-"><td  style="white-space:wrap; text-align:left;" id="TBL-16-6-1"  
+class="td11"><!--l. 777--><p class="noindent" >           </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-6-2"  
+class="td11"><!--l. 777--><p class="noindent" ><span 
+class="cmr-12">The id of the process where the preconditioner description</span>
+<span 
+class="cmr-12">will be printed; the default is </span><span class="lstinline"></span><span 
+class="cmtt-12">psb_root_</span><span 
+class="cmr-12">.</span>                          </td>
+</tr><tr  
+ style="vertical-align:baseline;" id="TBL-16-7-"><td  style="white-space:wrap; text-align:left;" id="TBL-16-7-1"  
+class="td11"><!--l. 779--><p class="noindent" ><span class="lstinline"></span><span 
+class="cmtt-12">verbosity</span>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-7-2"  
+class="td11"><!--l. 779--><p class="noindent" ><span class="lstinline"></span><span 
+class="cmtt-12">integer</span><span 
+class="cmtt-12">,</span><span 
+class="cmtt-12">&#x00A0;</span><span 
+class="cmtt-12">intent</span><span 
+class="cmtt-12">(</span><span 
+class="cmtt-12">in</span><span 
+class="cmtt-12">),</span><span 
+class="cmtt-12">&#x00A0;</span><span 
+class="cmtt-12">optional</span><span 
+class="cmr-12">.</span>                                 </td>
+</tr><tr  
+ style="vertical-align:baseline;" id="TBL-16-8-"><td  style="white-space:wrap; text-align:left;" id="TBL-16-8-1"  
+class="td11"><!--l. 780--><p class="noindent" >           </td><td  style="white-space:wrap; text-align:left;" id="TBL-16-8-2"  
+class="td11"><!--l. 780--><p class="noindent" ><span 
+class="cmr-12">The verbosity level of the description. Default value is 0. For</span>
+<span 
+class="cmr-12">values higher than 0, it prints out further information, e.g., for</span>
+<span 
+class="cmr-12">a distributed multilevel preconditioner the size of the coarse</span>
+<span 
+class="cmr-12">matrices on every process.</span>                                              </td>
+</tr><tr  
+ style="vertical-align:baseline;" id="TBL-16-9-"><td  style="white-space:wrap; text-align:left;" id="TBL-16-9-1"  
+class="td11">           </td> </tr></table></div>
                                                                                
 
                                                                                
-   <!--l. 779--><div class="crosslinks"><p class="noindent"><span 
+   <!--l. 787--><div class="crosslinks"><p class="noindent"><span 
 class="cmr-12">[</span><a 
 href="userhtmlsu15.html" ><span 
 class="cmr-12">next</span></a><span 
@@ -135,6 +191,6 @@ class="cmr-12">] [</span><a
 href="userhtmlse5.html#userhtmlsu14.html" ><span 
 class="cmr-12">up</span></a><span 
 class="cmr-12">] </span></p></div>
-<!--l. 779--><p class="indent" >   <a 
+<!--l. 787--><p class="indent" >   <a 
  id="tailuserhtmlsu14.html"></a>  
 </body></html> 
diff --git a/docs/html/userhtmlsu15.html b/docs/html/userhtmlsu15.html
index 4b735bf9..e9670bb8 100644
--- a/docs/html/userhtmlsu15.html
+++ b/docs/html/userhtmlsu15.html
@@ -10,7 +10,7 @@
 <link rel="stylesheet" type="text/css" href="userhtml.css"> 
 </head><body 
 >
-   <!--l. 779--><div class="crosslinks"><p class="noindent"><span 
+   <!--l. 787--><div class="crosslinks"><p class="noindent"><span 
 class="cmr-12">[</span><a 
 href="userhtmlsu14.html" ><span 
 class="cmr-12">prev</span></a><span 
@@ -28,19 +28,19 @@ class="cmr-12">] </span></p></div>
 class="cmr-12">5.9   </span></span> <a 
  id="x24-230005.9"></a><span 
 class="cmr-12">Auxiliary Methods</span></h4>
-<!--l. 780--><p class="noindent" ><span 
+<!--l. 788--><p class="noindent" ><span 
 class="cmr-12">Various functionalities are implemented as additional methods of the preconditioner</span>
 <span 
 class="cmr-12">object.</span>
-<!--l. 783--><p class="noindent" >
+<!--l. 791--><p class="noindent" >
    <h5 class="subsubsectionHead"><span class="titlemark"><span 
 class="cmr-12">5.9.1   </span></span> <a 
  id="x24-240005.9.1"></a><span 
 class="cmr-12">Method: dump</span></h5>
 <div class="center" 
 >
-<!--l. 785--><p class="noindent" >
-<!--l. 786--><p class="noindent" ><span class="lstinline"></span><span 
+<!--l. 793--><p class="noindent" >
+<!--l. 794--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">call</span><span 
 class="cmtt-12">&#x00A0;</span><span 
 class="cmtt-12">p</span><span 
@@ -68,9 +68,9 @@ class="cmtt-12">,</span><span
 class="cmtt-12">global_num</span><span 
 class="cmtt-12">])</span><br />
 </div>
-<!--l. 789--><p class="noindent" ><span 
+<!--l. 797--><p class="noindent" ><span 
 class="cmr-12">Dump on file.</span>
-<!--l. 792--><p class="noindent" ><span 
+<!--l. 800--><p class="noindent" ><span 
 class="cmbx-12">Arguments</span>
    <div class="tabular"> <table id="TBL-17" class="tabular" 
 cellspacing="0" cellpadding="0"  
@@ -78,9 +78,9 @@ cellspacing="0" cellpadding="0"
 id="TBL-17-1"><col 
 id="TBL-17-2"></colgroup><tr  
  style="vertical-align:baseline;" id="TBL-17-1-"><td  style="white-space:wrap; text-align:left;" id="TBL-17-1-1"  
-class="td11"><!--l. 795--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 803--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">info</span>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-17-1-2"  
-class="td11"><!--l. 795--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 803--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">integer</span><span 
 class="cmtt-12">,</span><span 
 class="cmtt-12">&#x00A0;</span><span 
@@ -91,8 +91,8 @@ class="cmtt-12">)</span><span
 class="cmr-12">.</span>                                                       </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-17-2-"><td  style="white-space:wrap; text-align:left;" id="TBL-17-2-1"  
-class="td11"><!--l. 796--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-17-2-2"  
-class="td11"><!--l. 796--><p class="noindent" ><span 
+class="td11"><!--l. 804--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-17-2-2"  
+class="td11"><!--l. 804--><p class="noindent" ><span 
 class="cmr-12">Error code. If no error, 0 is returned. See Section</span><span 
 class="cmr-12">&#x00A0;</span><a 
 href="userhtmlse7.html#x26-300007"><span 
@@ -100,9 +100,9 @@ class="cmr-12">7</span><!--tex4ht:ref: sec:errors --></a> <span
 class="cmr-12">for details.</span>     </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-17-3-"><td  style="white-space:wrap; text-align:left;" id="TBL-17-3-1"  
-class="td11"><!--l. 797--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 805--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">amold</span> </td><td  style="white-space:wrap; text-align:left;" id="TBL-17-3-2"  
-class="td11"><!--l. 797--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 805--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">class</span><span 
 class="cmtt-12">(</span><span 
 class="cmtt-12">psb_</span><span 
@@ -119,8 +119,8 @@ class="cmtt-12">optional</span><span
 class="cmr-12">.</span>       </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-17-4-"><td  style="white-space:wrap; text-align:left;" id="TBL-17-4-1"  
-class="td11"><!--l. 798--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-17-4-2"  
-class="td11"><!--l. 798--><p class="noindent" ><span 
+class="td11"><!--l. 806--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-17-4-2"  
+class="td11"><!--l. 806--><p class="noindent" ><span 
 class="cmr-12">The  desired  dynamic  type  for  internal  matrix  components;  this</span>
 <span 
 class="cmr-12">allows  e.g.  running  on  GPUs;  it  needs  not  be  the  same  on  all</span>
@@ -134,15 +134,15 @@ class="cmr-12">.</span>             </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-17-5-"><td  style="white-space:wrap; text-align:left;" id="TBL-17-5-1"  
 class="td11">      </td> </tr></table></div>
-<!--l. 805--><p class="noindent" >
+<!--l. 813--><p class="noindent" >
    <h5 class="subsubsectionHead"><span class="titlemark"><span 
 class="cmr-12">5.9.2   </span></span> <a 
  id="x24-250005.9.2"></a><span 
 class="cmr-12">Method: clone</span></h5>
 <div class="center" 
 >
-<!--l. 807--><p class="noindent" >
-<!--l. 808--><p class="noindent" ><span class="lstinline"></span><span 
+<!--l. 815--><p class="noindent" >
+<!--l. 816--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">call</span><span 
 class="cmtt-12">&#x00A0;</span><span 
 class="cmtt-12">p</span><span 
@@ -157,9 +157,9 @@ class="cmtt-12">)</span><br />
                                                                                
 
                                                                                
-<!--l. 811--><p class="noindent" ><span 
+<!--l. 819--><p class="noindent" ><span 
 class="cmr-12">Create a (deep) copy of the preconditioner object.</span>
-<!--l. 814--><p class="noindent" ><span 
+<!--l. 822--><p class="noindent" ><span 
 class="cmbx-12">Arguments</span>
    <div class="tabular"> <table id="TBL-18" class="tabular" 
 cellspacing="0" cellpadding="0"  
@@ -167,9 +167,9 @@ cellspacing="0" cellpadding="0"
 id="TBL-18-1"><col 
 id="TBL-18-2"></colgroup><tr  
  style="vertical-align:baseline;" id="TBL-18-1-"><td  style="white-space:wrap; text-align:left;" id="TBL-18-1-1"  
-class="td11"><!--l. 817--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 825--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">pout</span>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-18-1-2"  
-class="td11"><!--l. 817--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 825--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">type</span><span 
 class="cmtt-12">(</span><span 
 class="cmtt-12">amg_</span><span 
@@ -184,8 +184,8 @@ class="cmtt-12">)</span><span
 class="cmr-12">.</span>                                  </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-18-2-"><td  style="white-space:wrap; text-align:left;" id="TBL-18-2-1"  
-class="td11"><!--l. 818--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-18-2-2"  
-class="td11"><!--l. 818--><p class="noindent" ><span 
+class="td11"><!--l. 826--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-18-2-2"  
+class="td11"><!--l. 826--><p class="noindent" ><span 
 class="cmr-12">The copy of the preconditioner data structure. Note that </span><span 
 class="cmti-12">x </span><span 
 class="cmr-12">must</span>
@@ -199,9 +199,9 @@ class="cmr-12">, single/double precision</span>
 class="cmr-12">version of AMG4PSBLAS under use.</span>                                       </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-18-3-"><td  style="white-space:wrap; text-align:left;" id="TBL-18-3-1"  
-class="td11"><!--l. 821--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 829--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">info</span>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-18-3-2"  
-class="td11"><!--l. 821--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 829--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">integer</span><span 
 class="cmtt-12">,</span><span 
 class="cmtt-12">&#x00A0;</span><span 
@@ -212,8 +212,8 @@ class="cmtt-12">)</span><span
 class="cmr-12">.</span>                                                       </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-18-4-"><td  style="white-space:wrap; text-align:left;" id="TBL-18-4-1"  
-class="td11"><!--l. 822--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-18-4-2"  
-class="td11"><!--l. 822--><p class="noindent" ><span 
+class="td11"><!--l. 830--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-18-4-2"  
+class="td11"><!--l. 830--><p class="noindent" ><span 
 class="cmr-12">Error code. If no error, 0 is returned. See Section</span><span 
 class="cmr-12">&#x00A0;</span><a 
 href="userhtmlse7.html#x26-300007"><span 
@@ -222,15 +222,15 @@ class="cmr-12">for details.</span>     </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-18-5-"><td  style="white-space:wrap; text-align:left;" id="TBL-18-5-1"  
 class="td11">      </td> </tr></table></div>
-<!--l. 827--><p class="noindent" >
+<!--l. 835--><p class="noindent" >
    <h5 class="subsubsectionHead"><span class="titlemark"><span 
 class="cmr-12">5.9.3   </span></span> <a 
  id="x24-260005.9.3"></a><span 
 class="cmr-12">Method: sizeof</span></h5>
 <div class="center" 
 >
-<!--l. 829--><p class="noindent" >
-<!--l. 830--><p class="noindent" ><span class="lstinline"></span><span 
+<!--l. 837--><p class="noindent" >
+<!--l. 838--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">sz</span><span 
 class="cmtt-12">&#x00A0;</span><span 
 class="cmtt-12">=</span><span 
@@ -240,9 +240,9 @@ class="cmtt-12">%</span><span
 class="cmtt-12">sizeof</span><span 
 class="cmtt-12">()</span><br />
 </div>
-<!--l. 833--><p class="noindent" ><span 
+<!--l. 841--><p class="noindent" ><span 
 class="cmr-12">Return memory footprint in bytes.</span>
-<!--l. 836--><p class="noindent" >
+<!--l. 844--><p class="noindent" >
    <h5 class="subsubsectionHead"><span class="titlemark"><span 
 class="cmr-12">5.9.4   </span></span> <a 
  id="x24-270005.9.4"></a><span 
@@ -250,8 +250,8 @@ class="cmr-12">Method: allocate</span><span
 class="cmr-12">_wrk</span></h5>
 <div class="center" 
 >
-<!--l. 838--><p class="noindent" >
-<!--l. 839--><p class="noindent" ><span class="lstinline"></span><span 
+<!--l. 846--><p class="noindent" >
+<!--l. 847--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">call</span><span 
 class="cmtt-12">&#x00A0;</span><span 
 class="cmtt-12">p</span><span 
@@ -264,7 +264,7 @@ class="cmtt-12">&#x00A0;</span><span
 class="cmtt-12">vmold</span><span 
 class="cmtt-12">])</span><br />
 </div>
-<!--l. 842--><p class="noindent" ><span 
+<!--l. 850--><p class="noindent" ><span 
 class="cmr-12">Allocate internal work vectors. Each application of the preconditioner uses a number of</span>
 <span 
 class="cmr-12">work vectors which are allocated internally as necessary; therefore allocation and</span>
@@ -296,7 +296,7 @@ class="cmr-12">argument to the </span><span class="lstinline"></span><span
 class="cmtt-12">apply</span>
 <span 
 class="cmr-12">method.</span>
-<!--l. 858--><p class="noindent" ><span 
+<!--l. 866--><p class="noindent" ><span 
 class="cmbx-12">Arguments</span>
    <div class="tabular"> <table id="TBL-19" class="tabular" 
 cellspacing="0" cellpadding="0"  
@@ -304,9 +304,9 @@ cellspacing="0" cellpadding="0"
 id="TBL-19-1"><col 
 id="TBL-19-2"></colgroup><tr  
  style="vertical-align:baseline;" id="TBL-19-1-"><td  style="white-space:wrap; text-align:left;" id="TBL-19-1-1"  
-class="td11"><!--l. 861--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 869--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">info</span>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-19-1-2"  
-class="td11"><!--l. 861--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 869--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">integer</span><span 
 class="cmtt-12">,</span><span 
 class="cmtt-12">&#x00A0;</span><span 
@@ -317,8 +317,8 @@ class="cmtt-12">)</span><span
 class="cmr-12">.</span>                                                       </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-19-2-"><td  style="white-space:wrap; text-align:left;" id="TBL-19-2-1"  
-class="td11"><!--l. 862--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-19-2-2"  
-class="td11"><!--l. 862--><p class="noindent" ><span 
+class="td11"><!--l. 870--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-19-2-2"  
+class="td11"><!--l. 870--><p class="noindent" ><span 
 class="cmr-12">Error code. If no error, 0 is returned. See Section</span><span 
 class="cmr-12">&#x00A0;</span><a 
 href="userhtmlse7.html#x26-300007"><span 
@@ -326,9 +326,9 @@ class="cmr-12">7</span><!--tex4ht:ref: sec:errors --></a> <span
 class="cmr-12">for details.</span>     </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-19-3-"><td  style="white-space:wrap; text-align:left;" id="TBL-19-3-1"  
-class="td11"><!--l. 863--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 871--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">vmold</span> </td><td  style="white-space:wrap; text-align:left;" id="TBL-19-3-2"  
-class="td11"><!--l. 863--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 871--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">class</span><span 
 class="cmtt-12">(</span><span 
 class="cmtt-12">psb_</span><span 
@@ -345,15 +345,15 @@ class="cmtt-12">optional</span><span
 class="cmr-12">.</span>         </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-19-4-"><td  style="white-space:wrap; text-align:left;" id="TBL-19-4-1"  
-class="td11"><!--l. 864--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-19-4-2"  
-class="td11"><!--l. 864--><p class="noindent" ><span 
+class="td11"><!--l. 872--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-19-4-2"  
+class="td11"><!--l. 872--><p class="noindent" ><span 
 class="cmr-12">The  desired  dynamic  type  for  internal  vector  components;  this</span>
 <span 
 class="cmr-12">allows e.g. running on GPUs.</span>                                                 </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-19-5-"><td  style="white-space:wrap; text-align:left;" id="TBL-19-5-1"  
 class="td11">      </td> </tr></table></div>
-<!--l. 870--><p class="noindent" >
+<!--l. 878--><p class="noindent" >
    <h5 class="subsubsectionHead"><span class="titlemark"><span 
 class="cmr-12">5.9.5   </span></span> <a 
  id="x24-280005.9.5"></a><span 
@@ -361,8 +361,8 @@ class="cmr-12">Method: free</span><span
 class="cmr-12">_wrk</span></h5>
 <div class="center" 
 >
-<!--l. 872--><p class="noindent" >
-<!--l. 873--><p class="noindent" ><span class="lstinline"></span><span 
+<!--l. 880--><p class="noindent" >
+<!--l. 881--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">call</span><span 
 class="cmtt-12">&#x00A0;</span><span 
 class="cmtt-12">p</span><span 
@@ -372,9 +372,9 @@ class="cmtt-12">(</span><span
 class="cmtt-12">info</span><span 
 class="cmtt-12">)</span><br />
 </div>
-<!--l. 876--><p class="noindent" ><span 
+<!--l. 884--><p class="noindent" ><span 
 class="cmr-12">Deallocate internal work vectors.</span>
-<!--l. 879--><p class="noindent" ><span 
+<!--l. 887--><p class="noindent" ><span 
 class="cmbx-12">Arguments</span>
    <div class="tabular"> <table id="TBL-20" class="tabular" 
 cellspacing="0" cellpadding="0"  
@@ -382,9 +382,9 @@ cellspacing="0" cellpadding="0"
 id="TBL-20-1"><col 
 id="TBL-20-2"></colgroup><tr  
  style="vertical-align:baseline;" id="TBL-20-1-"><td  style="white-space:wrap; text-align:left;" id="TBL-20-1-1"  
-class="td11"><!--l. 882--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 890--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">info</span>  </td><td  style="white-space:wrap; text-align:left;" id="TBL-20-1-2"  
-class="td11"><!--l. 882--><p class="noindent" ><span class="lstinline"></span><span 
+class="td11"><!--l. 890--><p class="noindent" ><span class="lstinline"></span><span 
 class="cmtt-12">integer</span><span 
 class="cmtt-12">,</span><span 
 class="cmtt-12">&#x00A0;</span><span 
@@ -395,8 +395,8 @@ class="cmtt-12">)</span><span
 class="cmr-12">.</span>                                                       </td>
 </tr><tr  
  style="vertical-align:baseline;" id="TBL-20-2-"><td  style="white-space:wrap; text-align:left;" id="TBL-20-2-1"  
-class="td11"><!--l. 883--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-20-2-2"  
-class="td11"><!--l. 883--><p class="noindent" ><span 
+class="td11"><!--l. 891--><p class="noindent" >      </td><td  style="white-space:wrap; text-align:left;" id="TBL-20-2-2"  
+class="td11"><!--l. 891--><p class="noindent" ><span 
 class="cmr-12">Error code. If no error, 0 is returned. See Section</span><span 
 class="cmr-12">&#x00A0;</span><a 
 href="userhtmlse7.html#x26-300007"><span 
diff --git a/docs/src/covenant.tex b/docs/src/covenant.tex
index 8996d516..3d54e034 100644
--- a/docs/src/covenant.tex
+++ b/docs/src/covenant.tex
@@ -64,16 +64,18 @@ the consequences for any action they deem in violation of this Code of Conduct:
 \begin{enumerate}
 \item Correction
 
-Community Impact: Use of inappropriate language or other behavior deemed
+\textit{Community Impact:} Use of inappropriate language or other behavior deemed
 unprofessional or unwelcome in the community.
-Consequence: A private, written warning from community leaders, providing
+
+\textit{Consequence:} A private, written warning from community leaders, providing
 clarity around the nature of the violation and an explanation of why the
 behavior was inappropriate. A public apology may be requested.
 \item Warning
 
-Community Impact: A violation through a single incident or series
+\textit{Community Impact:} A violation through a single incident or series
 of actions.
-Consequence: A warning with consequences for continued behavior. No
+
+\textit{Consequence:} A warning with consequences for continued behavior. No
 interaction with the people involved, including unsolicited interaction with
 those enforcing the Code of Conduct, for a specified period of time. This
 includes avoiding interactions in community spaces as well as external channels
@@ -81,26 +83,28 @@ like social media. Violating these terms may lead to a temporary or
 permanent ban.
 \item Temporary Ban
 
-Community Impact: A serious violation of community standards, including
+\textit{Community Impact:} A serious violation of community standards, including
 sustained inappropriate behavior.
-Consequence: A temporary ban from any sort of interaction or public
+
+\textit{Consequence:} A temporary ban from any sort of interaction or public
 communication with the community for a specified period of time. No public or
 private interaction with the people involved, including unsolicited interaction
 with those enforcing the Code of Conduct, is allowed during this period.
 Violating these terms may lead to a permanent ban.
 \item Permanent Ban
 
-Community Impact: Demonstrating a pattern of violation of community
+\textit{Community Impact:} Demonstrating a pattern of violation of community
 standards, including sustained inappropriate behavior,  harassment of an
 individual, or aggression toward or disparagement of classes of individuals.
-Consequence: A permanent ban from any sort of public interaction within
+
+\textit{Consequence:} A permanent ban from any sort of public interaction within
 the community.
 \end{enumerate}
 
 \paragraph{Attribution}
 This Code of Conduct is adapted from the Contributor Covenant,
 version 2.0, available at
-\href{https://www.contributor-covenant.org/version/2/0/code_of_conduct.html}{https://www.contributor-covenant.org/version/2/0/code\_of\_conduct.html}.
+\href{https://www.contributor-covenant.org/version/2/0/code_of_conduct.html}{https://www.contributor-covenant.org/version/2/0/code\_of\_conduct .html}.
 Community Impact Guidelines were inspired by
 Mozilla’s code of conduct enforcement ladder.
 For answers to common questions about this code of conduct, see the FAQ at
diff --git a/docs/src/newobjects.tex b/docs/src/newobjects.tex
index abb058c8..1b8b4f1e 100644
--- a/docs/src/newobjects.tex
+++ b/docs/src/newobjects.tex
@@ -24,8 +24,8 @@ the context of the multilevel preconditioners it is necessary to:
 \item  pass that variable as the argument to the \verb|set| routine as in the
 following:
 \begin{center}
-\verb|call p%set(smoother,info [,ilev,ilmax,pos])|\\
-\verb|call p%set(solver,info [,ilev,ilmax,pos])|
+\fortinline|call p%set(smoother,info [,ilev,ilmax,pos])|\\
+\fortinline|call p%set(solver,info [,ilev,ilmax,pos])|
 \end{center}
 \item link the code implementing the various methods into the application executable.
 \end{itemize}
@@ -55,10 +55,10 @@ need to be ovverridden (rewritten).
 The interfaces for the calls shown above are defined using
 \begin{center}
 \begin{tabular}{p{1.4cm}p{12cm}}
-\verb|smoother| & \verb|class(amg_x_base_smoother_type)| \\
+\fortinline|smoother| & \fortinline|class(amg_x_base_smoother_type)| \\
               & The user-defined new smoother to be employed in the
                 preconditioner.\\
-\verb|solver| & \verb|class(amg_x_base_solver_type)| \\
+\fortinline|solver| & \fortinline|class(amg_x_base_solver_type)| \\
               & The user-defined new solver to be employed in the
                 preconditioner.
 \end{tabular}
@@ -67,6 +67,25 @@ The other arguments are defined in the way described in
 Sec.~\ref{sec:precset}.  As an example, in  the \verb|tests/newslv|
 code we define a new object of type \verb|amg_d_tlu_solver_type|, and
 we pass it as follows:
+\ifpdf
+\begin{minted}[breaklines=true,bgcolor=bg,fontsize=\small]{fortran}
+! sparse matrix and preconditioner
+type(psb_dspmat_type) :: a
+type(amg_dprec_type)  :: prec
+type(amg_d_tlu_solver_type) :: tlusv
+
+......
+!
+!  prepare the preconditioner: an ML with defaults, but with TLU solver at
+!  intermediate levels. All other parameters are at default values.
+!
+call prec%init('ML',       info)
+call prec%hierarchy_build(a,desc_a,info)
+nlv = prec%get_nlevs()
+call prec%set(tlusv,   info,ilev=1,ilmax=max(1,nlv-1))
+call prec%smoothers_build(a,desc_a,info)
+\end{minted}
+\else
 \begin{verbatim}
 
   ! sparse matrix and preconditioner
@@ -86,3 +105,4 @@ we pass it as follows:
   call prec%smoothers_build(a,desc_a,info)
 
 \end{verbatim}
+\fi
\ No newline at end of file
diff --git a/docs/src/userinterface.tex b/docs/src/userinterface.tex
index 26eff287..492446e2 100644
--- a/docs/src/userinterface.tex
+++ b/docs/src/userinterface.tex
@@ -757,7 +757,7 @@ This method deallocates the preconditioner data structure \fortinline|p|.
 \subsection{Method descr\label{sec:precdescr}}
 
 \begin{center}
-\fortinline|call p%descr(info, [iout])|\\
+\fortinline|call p%descr(info, [iout, root, verbosity])|\\
 \end{center}
 
 \noindent
@@ -767,12 +767,20 @@ or \fortinline|build|, have been called.
 
 {\vskip1.5\baselineskip\noindent\large\bfseries Arguments} \smallskip
 
-\begin{tabular}{p{1.2cm}p{12cm}}
+\begin{tabular}{p{2.2cm}p{11cm}}
 \fortinline|info|   & \fortinline|integer, intent(out)|.\\
               & Error code. If no error, 0 is returned. See Section~\ref{sec:errors} for details.\\
 \fortinline|iout|   & \fortinline|integer, intent(in), optional|.\\
               & The id of the file where the preconditioner description
                 will be printed; the default is the standard output.\\
+\fortinline|root|   & \fortinline|integer, intent(in), optional|.\\
+					& The id of the process where the preconditioner description
+					will be printed; the default is \fortinline|psb_root_|.\\
+\fortinline|verbosity|   & \fortinline|integer, intent(in), optional|.\\
+						 & The verbosity level of the description. Default value
+						 is 0. For values higher than 0, it prints out further
+						 information, e.g., for a distributed multilevel preconditioner
+						 the size of the coarse matrices on every process.\\
 \end{tabular}