With the help of Magnifier, any control can be partially magnified.

[TemplatePart(Name = ElementVisualBrush, Type = typeof(VisualBrush))]
public class Magnifier : AdornerElement

Attributes

Property	Description	Default Value	Remarks
HorizontalOffset	Horizontal offset relative to the mouse	0
VerticalOffset	Vertical offset relative to the mouse	0
Scale	Scale factor	5.0

Case

<Image Margin="16" hc:Magnifier.Instance="{x:Static hc:Magnifier.Default}" Source="/HandyControlDemo;component/Resources/Img/b1.jpg" Stretch="None"/>

<Image Margin="16" Source="/HandyControlDemo;component/Resources/Img/b1.jpg" Stretch="None">
    <hc:Magnifier.Instance>
        <hc:Magnifier Scale="6" HorizontalOffset="-16" VerticalOffset="-16"/>
    </hc:Magnifier.Instance>
</Image>