The PanStep determines the amount of panning applied when the ImageMagnifier has the focus and the user presses the arrow keys to move the magnifier over the image. To see the effect, change the PanStep, then click the magnifier and press the arrow keys.
You can position the magnifier using the Magnifier property. For example:
mag.UpdateLayout();
mag.Magnifier.Margin =
new Thickness(200, 200, 0, 0);
In this example, "mag" is the C1ImageMagnifier control. The calls UpdateLayout to make sure the control has created the magnifier itself. Then it positions the magnifier by setting its Margin property.
I hope this helps.