diff --git a/eeschema/sim/sim_plot_frame.cpp b/eeschema/sim/sim_plot_frame.cpp
index 9a8485fd59..ba0134d7e3 100644
--- a/eeschema/sim/sim_plot_frame.cpp
+++ b/eeschema/sim/sim_plot_frame.cpp
@@ -2,7 +2,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2016 CERN
- * Copyright (C) 2016-2017 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 2016-2018 KiCad Developers, see AUTHORS.txt for contributors.
  * @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
  * @author Maciej Suminski <maciej.suminski@cern.ch>
  *
@@ -191,6 +191,8 @@ SIM_PLOT_FRAME::SIM_PLOT_FRAME( KIWAY* aKiway, wxWindow* aParent )
     // instead of being behind the dialog frame (as it does)
     m_settingsDlg = NULL;
 
+    SetSize( ConvertDialogToPixels( wxSize( 400, 300 ) ) );
+
     // resize the subwindows size. At least on Windows, calling wxSafeYield before
     // resizing the subwindows forces the wxSplitWindows size events automatically generated
     // by wxWidgets to be executed before our resize code.
diff --git a/eeschema/sim/sim_plot_frame_base.cpp b/eeschema/sim/sim_plot_frame_base.cpp
index 30e8864d0b..9ecce9087a 100644
--- a/eeschema/sim/sim_plot_frame_base.cpp
+++ b/eeschema/sim/sim_plot_frame_base.cpp
@@ -1,8 +1,8 @@
 ///////////////////////////////////////////////////////////////////////////
-// C++ code generated with wxFormBuilder (version Sep  8 2016)
+// C++ code generated with wxFormBuilder (version Jan  2 2018)
 // http://www.wxformbuilder.org/
 //
-// PLEASE DO "NOT" EDIT THIS FILE!
+// PLEASE DO *NOT* EDIT THIS FILE!
 ///////////////////////////////////////////////////////////////////////////
 
 #include "sim_plot_frame_base.h"
@@ -11,7 +11,7 @@
 
 SIM_PLOT_FRAME_BASE::SIM_PLOT_FRAME_BASE( wxWindow* parent, wxWindowID id, const wxString& title, const wxPoint& pos, const wxSize& size, long style, const wxString& name ) : KIWAY_PLAYER( parent, id, title, pos, size, style, name )
 {
-	this->SetSizeHints( wxSize( 600,500 ), wxDefaultSize );
+	this->SetSizeHints( wxSize( 200,200 ), wxDefaultSize );
 	
 	m_mainMenu = new wxMenuBar( 0 );
 	m_fileMenu = new wxMenu();
@@ -266,6 +266,7 @@ SIM_PLOT_FRAME_BASE::SIM_PLOT_FRAME_BASE( wxWindow* parent, wxWindowID id, const
 	
 	this->SetSizer( m_sizerMain );
 	this->Layout();
+	m_sizerMain->Fit( this );
 	
 	this->Centre( wxBOTH );
 	
diff --git a/eeschema/sim/sim_plot_frame_base.fbp b/eeschema/sim/sim_plot_frame_base.fbp
index ba2458662f..2cd9ec647b 100644
--- a/eeschema/sim/sim_plot_frame_base.fbp
+++ b/eeschema/sim/sim_plot_frame_base.fbp
@@ -41,10 +41,10 @@
             <property name="hidden">0</property>
             <property name="id">wxID_ANY</property>
             <property name="maximum_size"></property>
-            <property name="minimum_size">600,500</property>
+            <property name="minimum_size">200,200</property>
             <property name="name">SIM_PLOT_FRAME_BASE</property>
             <property name="pos"></property>
-            <property name="size">883,594</property>
+            <property name="size">-1,-1</property>
             <property name="style">wxDEFAULT_FRAME_STYLE</property>
             <property name="subclass">KIWAY_PLAYER; kiway_player.h</property>
             <property name="title">Spice Simulator</property>
diff --git a/eeschema/sim/sim_plot_frame_base.h b/eeschema/sim/sim_plot_frame_base.h
index ca3ceaf979..4e6bbe14bc 100644
--- a/eeschema/sim/sim_plot_frame_base.h
+++ b/eeschema/sim/sim_plot_frame_base.h
@@ -1,8 +1,8 @@
 ///////////////////////////////////////////////////////////////////////////
-// C++ code generated with wxFormBuilder (version Sep  8 2016)
+// C++ code generated with wxFormBuilder (version Jan  2 2018)
 // http://www.wxformbuilder.org/
 //
-// PLEASE DO "NOT" EDIT THIS FILE!
+// PLEASE DO *NOT* EDIT THIS FILE!
 ///////////////////////////////////////////////////////////////////////////
 
 #ifndef __SIM_PLOT_FRAME_BASE_H__
@@ -11,9 +11,6 @@
 #include <wx/artprov.h>
 #include <wx/xrc/xmlres.h>
 #include <wx/intl.h>
-class KIWAY_PLAYER;
-class wxListView;
-
 #include "kiway_player.h"
 #include <wx/string.h>
 #include <wx/bitmap.h>
@@ -105,7 +102,7 @@ class SIM_PLOT_FRAME_BASE : public KIWAY_PLAYER
 	
 	public:
 		
-		SIM_PLOT_FRAME_BASE( wxWindow* parent, wxWindowID id = wxID_ANY, const wxString& title = _("Spice Simulator"), const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxSize( 883,594 ), long style = wxDEFAULT_FRAME_STYLE|wxTAB_TRAVERSAL, const wxString& name = wxT("SIM_PLOT_FRAME") );
+		SIM_PLOT_FRAME_BASE( wxWindow* parent, wxWindowID id = wxID_ANY, const wxString& title = _("Spice Simulator"), const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxSize( -1,-1 ), long style = wxDEFAULT_FRAME_STYLE|wxTAB_TRAVERSAL, const wxString& name = wxT("SIM_PLOT_FRAME") );
 		
 		~SIM_PLOT_FRAME_BASE();