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diff --git a/doc/holt_horiz.gif b/doc/holt_horiz.gif
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diff --git a/doc/holt_vert.gif b/doc/holt_vert.gif
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diff --git a/doc/sgpem2uman.texi b/doc/sgpem2uman.texi
index ad018ae..ffe9b94 100644
--- a/doc/sgpem2uman.texi
+++ b/doc/sgpem2uman.texi
@@ -863,16 +863,36 @@ The other clicks... are all the same!
 
 @strong{How to show/hide threads}
 
-With the menu item "Show Threads" under the "View" menu the user can enable or
+With the menu item "Show/Hide Threads" under the "View" menu the user can enable or
 disable threads visibility.
 
+@strong{Scaling the graph}
+
+The user can select a scaling mode to view the graph.@*
+This option is available with a popup menu right clicking in client area.
+
+The options available are:
+@itemize
+@item @strong{No scaling} (default mode) the graph isn't scaled at all.
+  A white space can appear at right or bottom of the graph or even
+  the dimension can exceed client area. With horizontal and vertical scrollbar
+  the user can view all the graph surface.
+@item @strong{Fit in window} the graph is resized to make visible every part of the graph.
+  A white (sometimes big) space can appear at right or bottom of the graph.
+@item @strong{Stretch in window}like above the graph is resized but even stretched
+  to cover all client area.
+@end itemize
+Always one of these commands isn't available at a time;
+the current mode doesn't appear because there isn't any reason to choose it.
+
+
 
 @c % -------------------------------------------------
 @node The Holt graph, The Preferences dialog, The Simulation widget, From the GUI
 @subsection The Holt graph
 @cindex holt
 
-@image{holt_circle,7.3cm,8cm,Screenshot of the holt graph}
+@image{holt_circle,10.2cm,10.4cm,Screenshot of the holt graph}
 
 The graph show the simulation status at @emph{this time}.@*
 It represent resources, processes or threads (and status),
@@ -884,6 +904,8 @@ is displayed.
 
 Resources are drawn as squares, processes and threads are circular, requests and
 allocations are in form of arrows.@*
+In center of resources are printed two lines: the name at top, the used/total places at bottom.@*
+Into schedulables is shown their name.@*
 An arrow from process (thread) to a resource is a request from the process to have
 the resource; an arrow from the resource to the process denote the allocation of the
 resource to the process.
@@ -898,31 +920,50 @@ The colors, as usual, are: green, yellow, red.
 
 @strong{How to show processes or threads}
 
-With the menu item "Show Threads" under the "View" menu the user can switch from
+With the menu item "Show/Hide Threads" under the "View" menu the user can switch from
 processes to threads visibility.
 
 @strong{How to show or hide the Holt Window}
 
 Holt graph, for pratical reasons, is placed in a separate frame out of the main
 application window.@*
-With the item "Show Holt graph" of the "View" menu is possible to show or hide
+With the item "Show/Hide Holt graph" of the "View" menu is possible to show or hide
 this window. To close is always possible to use the standard close button or
 system menu command.
 
+@strong{Changing graph disposition}
+
+The user can select the disposition of elements in the graph.@*
+This option is available with a popup menu right clicking in client area.
+
+The options available are:
+@itemize
+@item @strong{Dispose vertical} items are arranged vertially in two
+columns, resources at left, processes (or threads) at right.
+@item @strong{Dispose horizontal} items are arranged horizontally in two
+rows, resources at top, processes (or threads) at bottom.
+@item @strong{Dispose circular} the items are disposed along a circle.
+@item @strong{Auto dispose} (default mode) one of above is select in function of
+the aspect ratio of the window
+@end itemize
+Always one of these commands isn't available at a time;
+the current mode doesn't appear because there isn't any reason to choose it.
+
+
 @strong{Changing size and shape}
 
 The user can change size of the Holt window.@*
-As the window change size, his contents is scaled and rearranged to fit into
-the client area.@*
+As the window change size, his contents is scaled to fit into
+the client area.
+
+If the disposition is set in @emph{"Auto dispose"} mode then the disposition
+can change during the resizing operation as described following.@*
 If the height/width ratio is >= 5/3 the items are arranged vertially in two
 columns, resources at left, processes (or threads) at right.@*
 If the height/width ratio is <= 3/5 the items are arranged horizontally in two
 rows, resources at top, processes (or threads) at bottom.@*
 Otherwise the items are disposed along a circle.
 
-@image{holt_vert,12.1cm,8cm,Vertical arrangement of the holt graph}
-@image{holt_horiz,4.5cm,8cm,Horizontal arrangement of the holt graph}
-
 @c % -------------------------------------------------
 @node The Preferences dialog, Controlling the simulation, The Holt graph, From the GUI
 @subsection The Preferences dialog