diff --git a/GUI/GARbro.GUI.csproj b/GUI/GARbro.GUI.csproj
index 8473c37a..996c47b3 100644
--- a/GUI/GARbro.GUI.csproj
+++ b/GUI/GARbro.GUI.csproj
@@ -176,6 +176,9 @@
       <SubType>Component</SubType>
     </Compile>
     <Compile Include="Settings.cs" />
+    <Compile Include="SettingsWindow.xaml.cs">
+      <DependentUpon>SettingsWindow.xaml</DependentUpon>
+    </Compile>
     <Compile Include="Shell.cs" />
     <Compile Include="Strings\guiStrings.Designer.cs">
       <AutoGen>True</AutoGen>
@@ -238,6 +241,10 @@
       <DependentUpon>MainWindow.xaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
+    <Page Include="SettingsWindow.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="TextViewer.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
diff --git a/GUI/MainWindow.xaml b/GUI/MainWindow.xaml
index 2ae8c980..b0aa0954 100644
--- a/GUI/MainWindow.xaml
+++ b/GUI/MainWindow.xaml
@@ -135,6 +135,9 @@
                     <MenuItem Header="{x:Static s:guiStrings.MenuExit}" Command="{x:Static local:Commands.Exit}" InputGestureText="Ctrl+Q"/>
                 </MenuItem>
                 <MenuItem Header="{x:Static s:guiStrings.MenuView}">
+                    <MenuItem Header="Preferences" InputGestureText="Ctrl+P"
+                              Command="{x:Static local:Commands.Preferences}"/>
+                    <Separator/>
                     <MenuItem Header="{x:Static s:guiStrings.MenuFitWindow}" InputGestureText="Ctrl+H"
                           Command="{x:Static local:Commands.FitWindow}"/>
                     <MenuItem Header="{x:Static s:guiStrings.CtxMenuRefresh}" InputGestureText="F5"
@@ -372,6 +375,7 @@
         <KeyBinding Gesture="Ctrl+Q" Command="{x:Static local:Commands.Exit}"/>
         <KeyBinding Gesture="Ctrl+H" Command="{x:Static local:Commands.FitWindow}"/>
         <KeyBinding Gesture="Ctrl+A" Command="{x:Static local:Commands.SelectAll}"/>
+        <KeyBinding Gesture="Ctrl+P" Command="{x:Static local:Commands.Preferences}"/>
         <KeyBinding Gesture="Backspace" Command="{x:Static local:Commands.GoBack}"/>
         <KeyBinding Gesture="Alt+Left" Command="{x:Static local:Commands.GoBack}"/>
         <KeyBinding Gesture="Alt+Right" Command="{x:Static local:Commands.GoForward}"/>
@@ -412,6 +416,7 @@
         <CommandBinding Command="{x:Static local:Commands.About}"      Executed="AboutExec"      CanExecute="CanExecuteAlways"/>
         <CommandBinding Command="{x:Static local:Commands.CheckUpdates}" Executed="CheckUpdatesExec" CanExecute="CanExecuteUpdate"/>
         <CommandBinding Command="{x:Static local:Commands.StopPlayback}" Executed="StopPlaybackExec" CanExecute="CanExecutePlaybackControl"/>
+        <CommandBinding Command="{x:Static local:Commands.Preferences}" Executed="PreferencesExec" CanExecute="CanExecuteAlways"/>
         <CommandBinding Command="{x:Static local:Commands.Exit}"       Executed="ExitExec"       CanExecute="CanExecuteAlways"/>
     </Window.CommandBindings>
 </Window>
diff --git a/GUI/MainWindow.xaml.cs b/GUI/MainWindow.xaml.cs
index d2d17c06..77d87ec3 100644
--- a/GUI/MainWindow.xaml.cs
+++ b/GUI/MainWindow.xaml.cs
@@ -1289,6 +1289,13 @@ namespace GARbro.GUI
             about.ShowDialog();
         }
 
+        private void PreferencesExec (object sender, ExecutedRoutedEventArgs e)
+        {
+            var settings = new SettingsWindow();
+            settings.Owner = this;
+            settings.ShowDialog();
+        }
+
         private void CanExecuteAlways (object sender, CanExecuteRoutedEventArgs e)
         {
             e.CanExecute = true;
@@ -1517,5 +1524,6 @@ namespace GARbro.GUI
         public static readonly RoutedCommand NextItem = new RoutedCommand();
         public static readonly RoutedCommand CopyNames = new RoutedCommand();
         public static readonly RoutedCommand StopPlayback = new RoutedCommand();
+        public static readonly RoutedCommand Preferences = new RoutedCommand();
     }
 }
diff --git a/GUI/SettingsWindow.xaml b/GUI/SettingsWindow.xaml
new file mode 100644
index 00000000..f380bf16
--- /dev/null
+++ b/GUI/SettingsWindow.xaml
@@ -0,0 +1,178 @@
+<!-- Game Resource browser
+
+Copyright (C) 2018 by morkt
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+-->
+<Window x:Class="GARbro.GUI.SettingsWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:s="clr-namespace:GARbro.GUI.Strings"
+        xmlns:local="clr-namespace:GARbro.GUI"
+        Title="Settings" ShowInTaskbar="False" ResizeMode="NoResize"
+        FocusManager.FocusedElement="{Binding ElementName=SectionsPane}"
+        Background="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"
+        Height="400" Width="400" WindowStartupLocation="CenterOwner">
+    <Window.Resources>
+        <LinearGradientBrush x:Key="SectionTitleBackground" StartPoint="0,0" EndPoint="1,0">
+            <GradientStop Color="#FFA0A0FF" Offset="0"/>
+            <GradientStop Color="#FFE0E0FF" Offset="1"/>
+        </LinearGradientBrush>
+        <LinearGradientBrush x:Key="ItemSelectedBackground" StartPoint="0,0" EndPoint="1,1">
+            <GradientStop Color="#FF6AA2DC" Offset="0"/>
+            <GradientStop Color="#FF226EBC" Offset="1"/>
+        </LinearGradientBrush>
+        <LinearGradientBrush x:Key="ItemInactiveBackground" StartPoint="0,0" EndPoint="1,1">
+            <GradientStop Color="#FFA4B0DB" Offset="0"/>
+            <GradientStop Color="#FF91A2C4" Offset="1"/>
+        </LinearGradientBrush>
+        <ControlTemplate x:Key="BoundCheckBox" TargetType="CheckBox">
+            <CheckBox DataContext="{TemplateBinding DataContext}" IsChecked="{Binding Value}"
+                      Content="{Binding Text}" ToolTip="{Binding Description}" Margin="2"/>
+        </ControlTemplate>
+
+        <Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
+            <Setter Property="Focusable" Value="False"/>
+            <Setter Property="Template">
+                <Setter.Value>
+                    <ControlTemplate TargetType="ToggleButton">
+                        <Border Padding="5" Background="#00FFFFFF" Width="16" Height="16">
+                            <Path Fill="#FF595959" Stroke="#FF262626" x:Name="ExpandPath">
+                                <Path.Data>
+                                    <PathGeometry Figures="M0,0L0,6L6,0z" />
+                                </Path.Data>
+                                <Path.RenderTransform>
+                                    <RotateTransform Angle="135" CenterX="3" CenterY="3" />
+                                </Path.RenderTransform>
+                            </Path>
+                        </Border>
+                        <ControlTemplate.Triggers>
+                            <Trigger Property="IsMouseOver" Value="True">
+                                <Setter TargetName="ExpandPath" Property="Stroke" Value="#FF1BBBFF" />
+                                <Setter TargetName="ExpandPath" Property="Fill" Value="#FFFFFFFF" />
+                            </Trigger>
+                            <Trigger Property="IsChecked" Value="True">
+                                <Setter TargetName="ExpandPath" Property="RenderTransform">
+                                    <Setter.Value>
+                                        <RotateTransform Angle="180" CenterX="3" CenterY="3" />
+                                    </Setter.Value>
+                                </Setter>
+                                <Setter TargetName="ExpandPath" Property="Fill" Value="#FF595959" />
+                                <Setter TargetName="ExpandPath" Property="Stroke" Value="#FF262626" />
+                            </Trigger>
+                        </ControlTemplate.Triggers>
+                    </ControlTemplate>
+                </Setter.Value>
+            </Setter>
+        </Style>
+        <Style x:Key="{x:Type TreeViewItem}" TargetType="{x:Type TreeViewItem}">
+            <Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}"/>
+            <Setter Property="IsExpanded" Value="True"/>
+            <Setter Property="HorizontalContentAlignment" Value="Left" />
+
+            <!-- Force right-click to select TreeViewItem -->
+            <EventSetter Event="MouseRightButtonDown" Handler="tvi_MouseRightButtonDown" />
+
+            <!-- Select the whole TreeViewItem row, not only Header region -->
+            <Setter Property="Template">
+                <Setter.Value>
+                    <ControlTemplate TargetType="TreeViewItem">
+                        <ControlTemplate.Resources>
+                            <local:LeftMarginMultiplierConverter Length="19" x:Key="lengthConverter" />
+                        </ControlTemplate.Resources>
+                        <StackPanel>
+                            <Border x:Name="Bd" HorizontalAlignment="Stretch" Background="{TemplateBinding Background}"
+                                    BorderThickness="{TemplateBinding BorderThickness}"
+                                    BorderBrush="{TemplateBinding BorderBrush}" Padding="{TemplateBinding Padding}"
+                                    SnapsToDevicePixels="True" Grid.Column="1">
+                                <Grid Margin="{Binding Converter={StaticResource lengthConverter}, RelativeSource={RelativeSource TemplatedParent}}">
+                                    <Grid.ColumnDefinitions>
+                                        <ColumnDefinition Width="19" />
+                                        <ColumnDefinition />
+                                    </Grid.ColumnDefinitions>
+                                    <ToggleButton IsChecked="{Binding Path=IsExpanded, RelativeSource={RelativeSource TemplatedParent}}"
+                                                Style="{StaticResource ExpandCollapseToggleStyle}"
+                                                ClickMode="Press" Name="Expander"/>
+                                    <ContentPresenter x:Name="PART_Header" Grid.Column="1" ContentSource="Header"
+                                                    Content="{TemplateBinding HeaderedContentControl.Header}"
+                                                    ContentTemplate="{TemplateBinding HeaderTemplate}"
+                                                    ContentStringFormat="{TemplateBinding HeaderStringFormat}"
+                                                    ContentTemplateSelector="{TemplateBinding HeaderTemplateSelector}"
+                                                    HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                                                    SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
+                                </Grid>
+                            </Border>
+                            <ItemsPresenter x:Name="ItemsHost"/>
+                        </StackPanel>
+                        <ControlTemplate.Triggers>
+                            <Trigger Property="IsExpanded" Value="False">
+                                <Setter TargetName="ItemsHost" Property="Visibility" Value="Collapsed" />
+                            </Trigger>
+                            <Trigger Property="HasItems" Value="False">
+                                <Setter TargetName="Expander" Property="Visibility" Value="Hidden" />
+                            </Trigger>
+                            <Trigger Property="IsSelected" Value="True">
+                                <Setter TargetName="Bd" Property="Background" Value="{StaticResource ItemSelectedBackground}"/>
+                                <Setter Property="Foreground" Value="White" />
+                            </Trigger>
+                            <MultiTrigger>
+                                <MultiTrigger.Conditions>
+                                    <Condition Property="IsSelected" Value="True" />
+                                    <Condition Property="IsSelectionActive" Value="False" />
+                                    <Condition Property="IsFocused" Value="False" />
+                                </MultiTrigger.Conditions>
+                                <Setter TargetName="Bd" Property="Background" Value="{StaticResource ItemInactiveBackground}" />
+                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" />
+                            </MultiTrigger>
+                            <Trigger Property="IsEnabled" Value="False">
+                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
+                            </Trigger>
+                        </ControlTemplate.Triggers>
+                    </ControlTemplate>
+                </Setter.Value>
+            </Setter>
+        </Style>
+    </Window.Resources>
+
+    <DockPanel Margin="8">
+        <StackPanel DockPanel.Dock="Bottom" Margin="0,10,0,0" Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Bottom">
+            <Button Width="75" Height="25" Margin="0,0,10,0" Content="{x:Static s:guiStrings.ButtonOK}" IsDefault="True" Click="Button_ClickOk"/>
+            <Button Width="75" Height="25" Margin="0,0,10,0" Content="{x:Static s:guiStrings.ButtonCancel}" IsCancel="True"/>
+            <Button Width="75" Height="25" Margin="0" Content="Apply" Click="Button_ClickApply" IsEnabled="{Binding HasChanges}"/>
+        </StackPanel>
+        <TreeView x:Name="SectionsPane" DockPanel.Dock="Left" Padding="4" ItemsSource="{Binding Root}"
+                  TreeViewItem.Selected="OnSectionChanged">
+            <TreeView.ItemTemplate>
+                <HierarchicalDataTemplate ItemsSource="{Binding Children}">
+                    <TextBlock Text="{Binding Label}" Padding="0,0,4,0"/>
+                </HierarchicalDataTemplate>
+            </TreeView.ItemTemplate>
+        </TreeView>
+        <Border DockPanel.Dock="Right" BorderThickness="1" BorderBrush="Black" Margin="4,0,0,0" SnapsToDevicePixels="True">
+            <ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled" Padding="3"
+                          Background="{DynamicResource {x:Static SystemColors.WindowBrushKey}}">
+                <StackPanel Orientation="Vertical" DataContext="{Binding ElementName=SectionsPane,Path=SelectedItem}">
+                    <TextBlock Text="{Binding SectionTitle}" Background="{StaticResource SectionTitleBackground}"
+                               FontWeight="Bold" FontSize="14" Padding="2,0,2,0"/>
+                    <StackPanel x:Name="SettingsPane"/>
+                </StackPanel>
+            </ScrollViewer>
+        </Border>
+    </DockPanel>
+</Window>
diff --git a/GUI/SettingsWindow.xaml.cs b/GUI/SettingsWindow.xaml.cs
new file mode 100644
index 00000000..b8b9ce37
--- /dev/null
+++ b/GUI/SettingsWindow.xaml.cs
@@ -0,0 +1,268 @@
+/// Game Resource browser
+//
+// Copyright (C) 2018 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Input;
+using GameRes;
+
+namespace GARbro.GUI
+{
+    /// <summary>
+    /// Interaction logic for SettingsWindow.xaml
+    /// </summary>
+    public partial class SettingsWindow : Window
+    {
+        public SettingsWindow ()
+        {
+            InitializeComponent();
+
+            this.DataContext = this.ViewModel = CreateSettingsTree();
+        }
+
+        SettingsViewModel ViewModel;
+
+        private void OnSectionChanged (object sender, System.Windows.RoutedEventArgs e)
+        {
+            this.SettingsPane.Children.Clear();
+            var section = SectionsPane.SelectedValue as SettingsSectionView;
+            if (section != null && section.Panel != null)
+                this.SettingsPane.Children.Add (section.Panel);
+        }
+
+        private void Button_ClickApply (object sender, System.Windows.RoutedEventArgs e)
+        {
+            ApplyChanges();
+        }
+
+        private void Button_ClickOk (object sender, System.Windows.RoutedEventArgs e)
+        {
+            ApplyChanges();
+            DialogResult = true;
+        }
+
+        private void ApplyChanges ()
+        {
+            if (!ViewModel.HasChanges)
+                return;
+            if (OnApplyChanges != null)
+                OnApplyChanges (this, new EventArgs());
+            ViewModel.HasChanges = false;
+        }
+
+        private SettingsViewModel CreateSettingsTree ()
+        {
+            SettingsSectionView[] list = {
+                new SettingsSectionView {
+                    Label = "Formats",
+                    Children = EnumerateFormatsSettings()
+                },
+            };
+            list[0].IsSelected = true;
+            return new SettingsViewModel { Root = list };
+        }
+
+        IEnumerable<SettingsSectionView> EnumerateFormatsSettings ()
+        {
+            var default_margin = new Thickness (2);
+            var list = new List<SettingsSectionView>();
+            foreach (var format in FormatCatalog.Instance.Formats.Where (f => f.Settings != null && f.Settings.Any()))
+            {
+                var pane = new WrapPanel();
+                foreach (var setting in format.Settings)
+                {
+                    if (setting.Value is bool)
+                    {
+                        var view = new ResourceSettingView<bool> (setting);
+                        view.ValueChanged   += (s, e) => ViewModel.HasChanges = true;
+                        this.OnApplyChanges += (s, e) => view.Apply();
+
+                        var check_box = new CheckBox {
+                            Template = (ControlTemplate)this.Resources["BoundCheckBox"],
+                            DataContext = view,
+                        };
+                        pane.Children.Add (check_box);
+                    }
+                }
+                if (pane.Children.Count > 0)
+                {
+                    var section = new SettingsSectionView {
+                        Label = format.Tag,
+                        SectionTitle = "Formats :: "+format.Tag,
+                        Panel = pane
+                    };
+                    list.Add (section);
+                }
+            }
+            return list;
+        }
+
+        private void tvi_MouseRightButtonDown (object sender, MouseButtonEventArgs e)
+        {
+            var item = sender as TreeViewItem;
+            if (item != null && e.RightButton == MouseButtonState.Pressed)
+            {
+                item.Focus();
+                item.IsSelected = true;
+                e.Handled = true;
+            }
+        }
+
+        public delegate void ApplyEventHandler (object sender, EventArgs e);
+
+        public event ApplyEventHandler OnApplyChanges;
+    }
+
+    public class SettingsViewModel : INotifyPropertyChanged
+    {
+        public IEnumerable<SettingsSectionView> Root { get; set; }
+
+        bool    m_has_changes;
+        public bool HasChanges {
+            get { return m_has_changes; }
+            set {
+                if (value != m_has_changes)
+                {
+                    m_has_changes = value;
+                    OnPropertyChanged();
+                }
+            }
+        }
+
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        void OnPropertyChanged ([CallerMemberName] string propertyName = "")
+        {
+            if (PropertyChanged != null)
+            {
+                PropertyChanged (this, new PropertyChangedEventArgs (propertyName));
+            }
+        }
+    }
+
+    public class SettingsSectionView
+    {
+        public string        Label { get; set; }
+        public bool     IsSelected { get; set; }
+        public UIElement     Panel { get; set; }
+
+        string m_title;
+        public string SectionTitle {
+            get { return m_title ?? Label; }
+            set { m_title = value; }
+        }
+
+        public IEnumerable<SettingsSectionView> Children { get; set; }
+    }
+
+    public class ResourceSettingView<TValue>
+    {
+        public IResourceSetting Source { get; private set; }
+        public bool          IsChanged { get; private set; }
+        public string             Text { get { return Source.Text; } }
+        public string      Description { get { return Source.Description; } }
+
+        TValue m_value;
+        public TValue Value {
+            get { return m_value; }
+            set {
+                if (!EqualityComparer<TValue>.Default.Equals (m_value, value))
+                {
+                    m_value = value;
+                    IsChanged = true;
+                    OnValueChanged();
+                }
+            }
+        }
+
+        public ResourceSettingView (IResourceSetting src)
+        {
+            Source = src;
+            m_value = (TValue)src.Value;
+        }
+
+        public void Apply ()
+        {
+            if (IsChanged)
+            {
+                Source.Value = m_value;
+                IsChanged = false;
+            }
+        }
+
+        public event PropertyChangedEventHandler ValueChanged;
+
+        void OnValueChanged ()
+        {
+            if (ValueChanged != null)
+            {
+                ValueChanged (this, new PropertyChangedEventArgs ("Value"));
+            }
+        }
+    }
+
+    public static class TreeViewItemExtensions
+    {
+        /// <returns>Depth of the given TreeViewItem</returns>
+        public static int GetDepth (this TreeViewItem item)
+        {
+            var tvi = item.GetParent() as TreeViewItem;
+            if (tvi != null)
+                return tvi.GetDepth() + 1;
+            return 0;
+        }
+
+        /// <returns>Control that contains specified TreeViewItem
+        /// (either TreeView or another TreeViewItem).</returns>
+        public static ItemsControl GetParent (this TreeViewItem item)
+        {
+            return ItemsControl.ItemsControlFromItemContainer (item);
+        }
+    }
+
+    public class LeftMarginMultiplierConverter : IValueConverter
+    {
+        public double Length { get; set; }
+
+        public object Convert (object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            var item = value as TreeViewItem;
+            if (item == null)
+                return new Thickness(0);
+            double thickness = Length * item.GetDepth();
+
+            return new Thickness (thickness, 0, 0, 0);
+        }
+
+        public object ConvertBack (object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            throw new System.NotImplementedException();
+        }
+    }
+}