I refer to the Origin on the platen should be the reference point for scaling the image.
The Origin is indicated by an arrow on the top-left corner of the glass platen,
where a user should place the original material against.
What the Xerox copier does now when we choose to copy and enlarge an image, is use an origin point on the top (middle) edge of the glass platen.
So if you align your original image against the arrow on the glass platen, and scale 120%, your scale image ends up outside of your paper. This is because it is scaled 120% from left to right.
so currently the shift the paper we want enlarged away from the top left hand corner so the copy enlarges and stays on the page
how do we change the orgin point to the top left and avoid this issue