Choose the position of the overlay when using Swap overlay interaction

Hi guys, in my design i made a pop up using “open overlay”, I placed this pop up in the bottom-center of the frame and it has a action button to open a modal with additional info, the thing is that usually modals goes centered and have a background, when I use the “Swap overlay” interaction, I just can choice which frame i want to swap but I can’t choice the position or if I want to set a background, the frame is just shown in the same place I spotted the pop up.