(the actual graphics is more complicated than a sine curve but never mind).
Now if I just display the graphics by typing pict I can rescale this by clicking on the image and dragging the corners of the orange box. However when I overlay the graphics onto the image (as above) and try to drag the box it rescales the plot but not the background image. Is there any way I can link the two together so I can rescale by dragging the cursor? I tried GraphcsGrouping but that didn't get me anywhere.