How to place strip footing under basement slab?

[justinbourne.design]

I have a bearing wall that comes down to and runs along the middle of the basement slab, I am trying to apply a footing under it. Ideally it would be associated with the wall and have a 4" offset applied to it so it showed below the 4"slab, but at this point I'll take whatever works. Currently it shows up overlapping with the slab-

[ToanDN]

Make the footing type 4" thicker and join it with the floor.

[barthbradley]

Use the Structural Foundation: Wall to place footing under Wall and change the Wall's Base Offset to -4".  

[barthbradley]

Actually, wouldn't this be the condition?