WdGraphTabItemConfigStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:iconPacks="http://metro.mahapps.com/winfx/xaml/iconpacks">
    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="pack://application:,,,/FLY.ControlLibrary;component/Themes/Dictionary_MyStyle.xaml"/>
    </ResourceDictionary.MergedDictionaries>
    <Thickness x:Key="ControlMargin">5</Thickness>
    <Style TargetType="Button" x:Key="ButtonStyle_icon" BasedOn="{StaticResource ButtonStyle_empty}">
        <Style.Resources>
            <Style TargetType="TextBlock" >
                <Setter Property="FontSize" Value="15"/>
                <Setter Property="Foreground" Value="Black"/>
                <Setter Property="HorizontalAlignment" Value="Center"/>
            </Style>
            <Style TargetType="iconPacks:PackIconMaterial" >
                <Setter Property="Height" Value="40"/>
                <Setter Property="Width" Value="40"/>
                <Setter Property="HorizontalAlignment" Value="Center"/>
            </Style>
        </Style.Resources>
        <Style.Setters>
            <Setter Property="Foreground" Value="{StaticResource Color_theme_activity}"/>
            <Setter Property="HorizontalAlignment" Value="Right"/>
            <Setter Property="VerticalAlignment" Value="Bottom"/>
            <Setter Property="Margin" Value="{StaticResource ControlMargin}"/>
        </Style.Setters>
    </Style>
</ResourceDictionary>