Need help for Rotary engraving

The laser head is fixed in the bottom left of the work area, and I don’t know how to get it to the center of my image. It’s correctly configured in the system settings, but the green square is still fixed in the bottom left of the whole work area. Any idea how to fix this?

It’s in the config pages, look for a series of radio buttons in a grid. I think it’s called system config or page config, one of the config menus.