I’m not sure if you wanted to share an example but I interpret this one of two possibilities.
One would be pinning it to the site so it’s always on the screen to the left hand-side.
The other interpretation would be using the margins and docking the image to position the element where you would like (if it’s mean to be stuck to the left-hand of the screen, you would want to dock it to the left with 0 pixels in margin). Studio Editor: Working with Docking, Margins and Padding | Help Center | Wix.com