Form2 XAML

<Page
    x:Class="Nazwiska.Form2"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Nazwiska"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Height="847" Width="1269">

    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="3*"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition Height="4*"/>
            <RowDefinition/>
        </Grid.RowDefinitions>

        <TextBlock  Grid.Row="0" Grid.Column="0" Text="Imie" FontSize="48"  VerticalAlignment="Center" HorizontalTextAlignment="Center" />
        <TextBlock  Grid.Row="1" Grid.Column="0" Text="Nazwisko" FontSize="48"  VerticalAlignment="Center" HorizontalTextAlignment="Center" />
        <TextBlock  Grid.Row="2" Grid.Column="0" Text="Miasto" FontSize="48"  VerticalAlignment="Center" HorizontalTextAlignment="Center" />


        <TextBox  Grid.Row="0" Grid.Column="1" x:Name="ImieTxt" FontSize="48"  VerticalAlignment="Center" HorizontalTextAlignment="Center" Margin="0,0,20,0"/>
        <TextBox  Grid.Row="1" Grid.Column="1" x:Name="NazwiskoTxt" FontSize="48"  VerticalAlignment="Center" HorizontalTextAlignment="Center" Margin="0,0,20,0"/>
        <TextBox  Grid.Row="2" Grid.Column="1" x:Name="AdresTxt" FontSize="48"  VerticalAlignment="Center" HorizontalTextAlignment="Center" Margin="0,0,20,0"/>
        <StackPanel Grid.Row="4" Grid.ColumnSpan="2" HorizontalAlignment="Center" VerticalAlignment="Center">
            <RelativePanel>
                <Button Content="Dodaj" x:Name="dodajButton" RelativePanel.LeftOf="edytujButton" Width="150" Height="60" Background="LightGreen" Margin="0,0,300,0" FontSize="36" Click="dodajButton_Click"/>
                <Button Content="Edytuj" x:Name="edytujButton"  RelativePanel.AlignHorizontalCenterWithPanel="True" Background="LightGreen"  Width="150" Height="60" FontSize="36" Click="edytujButton_Click"/>
                <Button Content="Wróć" x:Name="powrocButton" RelativePanel.RightOf="edytujButton" Width="150" Background="LightGreen" Height="60" Margin="300,0,0,0" FontSize="36" Click="powrocButton_Click"/>
            </RelativePanel>

        </StackPanel>
        <StackPanel Grid.Row="3" Width="500" Height="274" Margin="68,0,0,0" VerticalAlignment="Center" HorizontalAlignment="Left" Grid.Column="1">
            <Image x:Name="Obrazek" VerticalAlignment="Center" HorizontalAlignment="Center" Height="274"/>
        </StackPanel>
    </Grid>
</Page>