MainWindow.xaml

<Window
        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:Zoom.Wpf"
        xmlns:Wpf="clr-namespace:DotNetBrowser.Wpf;assembly=DotNetBrowser.Wpf" x:Class="Zoom.Wpf.MainWindow"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800" Closed="MainWindow_OnClosed">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="40"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <Wpf:BrowserView Name="BrowserView" HorizontalAlignment="Stretch"  Grid.Row="1" VerticalAlignment="Stretch"/>
        <DockPanel HorizontalAlignment="Stretch" LastChildFill="False" VerticalAlignment="Stretch" >
            <CheckBox Name="ZoomEnabledCheckbox" Content="Zoom Enabled"  VerticalAlignment="Center" IsChecked="True"  
                      Margin="10"
                      Checked="ZoomEnabledCheckbox_OnChecked"
                      Unchecked="ZoomEnabledCheckbox_OnUnchecked"/>
            <Label Content="Use Ctrl + scroll to zoom" VerticalAlignment="Center" VerticalContentAlignment="Center" Foreground="Gray"/>
        </DockPanel>

    </Grid>
</Window>