diff --git a/eeschema/dialogs/dialog_sim_format_value_base.cpp b/eeschema/dialogs/dialog_sim_format_value_base.cpp
index 2e726aeb2e..535e4441a4 100644
--- a/eeschema/dialogs/dialog_sim_format_value_base.cpp
+++ b/eeschema/dialogs/dialog_sim_format_value_base.cpp
@@ -26,7 +26,7 @@ DIALOG_SIM_FORMAT_VALUE_BASE::DIALOG_SIM_FORMAT_VALUE_BASE( wxWindow* parent, wx
 	m_precisionLabel->Wrap( -1 );
 	fgSizer->Add( m_precisionLabel, 0, wxALIGN_CENTER_VERTICAL|wxLEFT, 5 );
 
-	m_precisionCtrl = new wxSpinCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxSP_ARROW_KEYS, 1, 10, 3 );
+	m_precisionCtrl = new wxSpinCtrl( this, wxID_ANY, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxSP_ARROW_KEYS, 1, 9, 3 );
 	fgSizer->Add( m_precisionCtrl, 0, wxALIGN_CENTER_VERTICAL|wxEXPAND|wxRIGHT|wxLEFT, 5 );
 
 	m_rangeLabel = new wxStaticText( this, wxID_ANY, _("Range:"), wxDefaultPosition, wxDefaultSize, 0 );
diff --git a/eeschema/dialogs/dialog_sim_format_value_base.fbp b/eeschema/dialogs/dialog_sim_format_value_base.fbp
index 5b97d04412..f03f36629e 100644
--- a/eeschema/dialogs/dialog_sim_format_value_base.fbp
+++ b/eeschema/dialogs/dialog_sim_format_value_base.fbp
@@ -171,7 +171,7 @@
                                 <property name="hidden">0</property>
                                 <property name="id">wxID_ANY</property>
                                 <property name="initial">3</property>
-                                <property name="max">10</property>
+                                <property name="max">9</property>
                                 <property name="max_size"></property>
                                 <property name="maximize_button">0</property>
                                 <property name="maximum_size"></property>
diff --git a/eeschema/sim/sim_plot_frame.cpp b/eeschema/sim/sim_plot_frame.cpp
index 8e6d2b5c14..c0319033cf 100644
--- a/eeschema/sim/sim_plot_frame.cpp
+++ b/eeschema/sim/sim_plot_frame.cpp
@@ -1712,20 +1712,72 @@ bool SIM_PLOT_FRAME::LoadWorkbook( const wxString& aPath )
 
             param = file.GetNextLine();
 
-            #if 0   // no longer in use
-            if( param.IsEmpty() )
-            {
-                DISPLAY_LOAD_ERROR( "Error loading workbook: Line %d is empty." );
-                file.Close();
-
-                return false;
-            }
-            #endif
-
             addTrace( name, (SIM_TRACE_TYPE) traceType );
+
+            TRACE* trace = GetCurrentPlot() ? GetCurrentPlot()->GetTrace( name ) : nullptr;
+
+            if( version >= 4 && trace )
+            {
+                auto readFormat =
+                        []( SPICE_VALUE_FORMAT* format, const wxString& text )
+                        {
+                            long val;
+                            text.Left( 1 ).ToLong( &val );
+                            format->Precision = (int) val;
+                            format->Range = text.Right( text.Length() - 1 );
+                        };
+
+                wxArrayString items = wxSplit( param, '|' );
+
+                for( const wxString& item : items )
+                {
+                    if( item.StartsWith( wxS( "rgb" ) ) )
+                    {
+                        wxColour color;
+                        color.Set( item );
+                        trace->SetTraceColour( color );
+                    }
+                    else if( item.StartsWith( wxS( "cursor1" ) ) )
+                    {
+                        wxArrayString parts = wxSplit( item, '.' );
+
+                        if( parts.size() == 3 )
+                        {
+                            readFormat( &m_cursorFormats[0][0], parts[1] );
+                            readFormat( &m_cursorFormats[0][1], parts[2] );
+                            GetCurrentPlot()->EnableCursor( name, 1, true );
+                        }
+                    }
+                    else if( item.StartsWith( wxS( "cursor2" ) ) )
+                    {
+                        wxArrayString parts = wxSplit( item, '.' );
+
+                        if( parts.size() == 3 )
+                        {
+                            readFormat( &m_cursorFormats[1][0], parts[1] );
+                            readFormat( &m_cursorFormats[1][1], parts[2] );
+                            GetCurrentPlot()->EnableCursor( name, 2, true );
+                        }
+                    }
+                    else if( item.StartsWith( wxS( "cursorD" ) ) )
+                    {
+                        wxArrayString parts = wxSplit( item, '.' );
+
+                        if( parts.size() == 3 )
+                        {
+                            readFormat( &m_cursorFormats[2][0], parts[1] );
+                            readFormat( &m_cursorFormats[2][1], parts[2] );
+                        }
+                    }
+                }
+            }
         }
     }
 
+    updateSignalsGrid();
+    wxCommandEvent dummy;
+    onCursorUpdate( dummy );
+
     file.Close();
 
     wxFileName filename( aPath );
@@ -1759,7 +1811,7 @@ bool SIM_PLOT_FRAME::SaveWorkbook( const wxString& aPath )
         file.Create();
     }
 
-    file.AddLine( wxT( "version 3" ) );
+    file.AddLine( wxT( "version 4" ) );
 
     file.AddLine( wxString::Format( wxT( "%llu" ), m_workbook->GetPageCount() ) );
 
@@ -1806,7 +1858,37 @@ bool SIM_PLOT_FRAME::SaveWorkbook( const wxString& aPath )
         {
             file.AddLine( wxString::Format( wxT( "%d" ), trace->GetType() ) );
             file.AddLine( trace->GetName() );
-            file.AddLine( trace->GetParam().IsEmpty() ? wxS( " " ) : trace->GetParam() );
+
+            wxString msg = COLOR4D( trace->GetTraceColour() ).ToCSSString();
+
+            if( trace->GetCursor( 1 ) )
+            {
+                msg += wxString::Format( wxS( "|cursor1.%d%s.%d%s" ),
+                                         m_cursorFormats[0][0].Precision,
+                                         m_cursorFormats[0][0].Range,
+                                         m_cursorFormats[0][1].Precision,
+                                         m_cursorFormats[0][1].Range );
+            }
+
+            if( trace->GetCursor( 2 ) )
+            {
+                msg += wxString::Format( wxS( "|cursor2.%d%s.%d%s" ),
+                                         m_cursorFormats[1][0].Precision,
+                                         m_cursorFormats[1][0].Range,
+                                         m_cursorFormats[1][1].Precision,
+                                         m_cursorFormats[1][1].Range );
+            }
+
+            if( trace->GetCursor( 1 ) || trace->GetCursor( 2 ) )
+            {
+                msg += wxString::Format( wxS( "|cursorD.%d%s.%d%s" ),
+                                         m_cursorFormats[2][0].Precision,
+                                         m_cursorFormats[2][0].Range,
+                                         m_cursorFormats[2][1].Precision,
+                                         m_cursorFormats[2][1].Range );
+            }
+
+            file.AddLine( msg );
         }
     }
 
diff --git a/eeschema/sim/sim_plot_panel.h b/eeschema/sim/sim_plot_panel.h
index 09af037d3e..efc847ce78 100644
--- a/eeschema/sim/sim_plot_panel.h
+++ b/eeschema/sim/sim_plot_panel.h
@@ -176,20 +176,10 @@ public:
         return m_traceColour;
     }
 
-    const wxString& GetParam() const
-    {
-        return m_param;
-    }
-
-
 protected:
     std::map<int, CURSOR*> m_cursors;       // No ownership; the mpWindow owns the CURSORs
     SIM_TRACE_TYPE         m_type;
     wxColour               m_traceColour;
-
-private:
-    ///< Name of the signal parameter
-    wxString               m_param;
 };