Moving the Origin to a specific point on an Image

I if try to trace around an uploaded background image, I need to place my origin (orange dot) at a specific location, but the entire image is locked to the orange dot and they both move at the same time! I click on ‘Options’ at the upper right-hand side and check, under ‘Transform’ ‘Affect Only’ > Origins. How do I create a start point for tracing on an image. How do I make the image not respond. Thanks.