MainWindow.xaml

<Window x:Class="Free_Gamma.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Free_Gamma"
        mc:Ignorable="d"
        Title="Free Gamma" FontSize="14" SizeToContent="WidthAndHeight" ResizeMode="CanMinimize"  WindowStartupLocation="CenterScreen" TextOptions.TextFormattingMode="Display">


    <StackPanel x:Name="pnl_1" Background="WhiteSmoke" >

        <StackPanel Margin="15" HorizontalAlignment="Center" VerticalAlignment="Center">
            <DockPanel LastChildFill="False">
                <Button x:Name="btn_CalibrationImage" Width="{Binding ElementName=btn_Profiles, Path=ActualHeight}" Margin="0,0,5,0">
                    <StackPanel Width="15">
                        <Grid Height="5" Background="Red" />
                        <Grid Height="5" Background="Lime" />
                        <Grid Height="5" Background="Blue" />
                    </StackPanel>
                </Button>
                <Button x:Name="btn_Profiles" Content="..." Width="{Binding ElementName=btn_Profiles, Path=ActualHeight}" Margin="0,0,5,0"/>
                <ComboBox x:Name="cmbo_Profile" Width="224" VerticalContentAlignment="Center" HorizontalAlignment="Left" FocusVisualStyle="{x:Null}" Padding="6,0,5,0"/>
                <StackPanel x:Name="pnl_Save" Orientation="Horizontal" HorizontalAlignment="Center" DockPanel.Dock="Right">
                    <Label x:Name="lbl_Save" Content="Save" Foreground="#FF002EFF" Padding="3,5,3,4" VerticalContentAlignment="Bottom" Cursor="Hand"/>
                    <Rectangle Width="4"/>
                    <Label x:Name="lbl_CancelSave" Content="Cancel" Foreground="#FF002EFF" Padding="3,5,3,4" VerticalContentAlignment="Bottom" Cursor="Hand"/>
                    <Rectangle Width="4"/>
                    <Label x:Name="lbl_SaveAs" Content="Save As" Foreground="#FF002EFF" Padding="3,5,3,4" VerticalContentAlignment="Bottom" Cursor="Hand"/>
                </StackPanel>
            </DockPanel>

            <Rectangle Height="13"/>

            <Border BorderThickness="1" BorderBrush="#FFBFBFBF">
                <StackPanel Orientation="Horizontal" Margin="10">

                    <StackPanel >
                        <DockPanel LastChildFill="True">
                            <ComboBox x:Name="cmbo_Mode" Width="180" Height="23" VerticalContentAlignment="Center" HorizontalAlignment="Left" FocusVisualStyle="{x:Null}" Padding="6,0,5,0"/>
                            <Rectangle Width="6" HorizontalAlignment="Left"/>
                            <ComboBox x:Name="cmbo_Channel" Height="23" VerticalContentAlignment="Center" FocusVisualStyle="{x:Null}" Padding="6,0,5,0"/>
                        </DockPanel>

                        <Rectangle Height="10"/>
                        <local:ctrl_RampGraph x:Name="Graph"/>
                    </StackPanel>


                    <Rectangle Width="1" Fill="#FFD1D1D1" Margin="15,0"/>


                    <StackPanel x:Name="pnl_Sliders"  Orientation="Horizontal">
                        <StackPanel Background="#FFFFC3C3" VerticalAlignment="Center" >
                            <Slider Style="{DynamicResource SliderStyle1}" x:Name="slider_master_brightness_red" Orientation="Vertical" Margin="0,10,0,0" Value="100" Minimum="10" Maximum="100" Height="240" HorizontalAlignment="Center"/>
                            <TextBox x:Name="txt_red_value" BorderThickness="0" Background="Transparent"  Width="32" Margin="0,8,0,2" Text="100%" HorizontalContentAlignment="Center" Foreground="#FF565656" Focusable="False" FontSize="12"/>
                        </StackPanel>

                        <Rectangle Width="10"/>
                        <StackPanel Background="#FFC3FFC5" VerticalAlignment="Center" >
                            <Slider Style="{DynamicResource SliderStyle1}" x:Name="slider_master_brightness_green" Orientation="Vertical" Margin="0,10,0,0" Value="100" Minimum="10" Maximum="100" Height="240" HorizontalAlignment="Center"/>
                            <TextBox x:Name="txt_green_value" BorderThickness="0" Background="Transparent"  Width="32" Margin="0,8,0,2" HorizontalContentAlignment="Center" Text="100%" Foreground="#FF565656" Focusable="False" FontSize="12"/>
                        </StackPanel>

                        <Rectangle Width="10"/>
                        <StackPanel Background="#FFC3C5FF" VerticalAlignment="Center" >
                            <Slider Style="{DynamicResource SliderStyle1}" x:Name="slider_master_brightness_blue" Orientation="Vertical" Margin="0,10,0,0" Value="100" Minimum="10" Maximum="100" Height="240" HorizontalAlignment="Center"/>
                            <TextBox x:Name="txt_blue_value" BorderThickness="0" Background="Transparent"  Width="32" Margin="0,8,0,2" HorizontalContentAlignment="Center" Text="100%" Foreground="#FF565656" Focusable="False" FontSize="12"/>
                        </StackPanel>

                        <Rectangle Width="15"/>
                        <StackPanel VerticalAlignment="Center">
                            <Slider Style="{DynamicResource SliderStyle1}" x:Name="slider_master_brightness" Orientation="Vertical" Margin="0,10,0,0" Value="90" Minimum="10" Maximum="100" Height="240" HorizontalAlignment="Center"/>
                            <TextBox x:Name="txt_brightness_value" BorderThickness="0" Background="Transparent"  Width="32" Margin="0,8,0,2" Text="100%" HorizontalContentAlignment="Center" Foreground="#FF565656" Focusable="False" FontSize="12"/>
                        </StackPanel>
                    </StackPanel>

                </StackPanel>
            </Border>

        </StackPanel>



    </StackPanel>


</Window>