Attributes

Property
SourceSize
Position
HorizontalOffset
VerticalOffset

Example

<Grid>
    <Image dev:Magnifier.Instance="{x:Bind MyMagnifier, Mode=OneWay}"
           Source="ms-appx:///Assets/Others/Girl.jpg" />
    <dev:Magnifier x:Name="MyMagnifier" />
</Grid>

Demo

you can run demo and see this feature.