How can I control which borders are affected by the insetting tool? I am trying to modify geometry in a model I am working on. I want to inset one of my forms but only want the border at the top and not the sides as I want to extrude it inwards. I have tried with the boundary and individual options "on" but I can't get it. Am including an image. I must be close, but would need a hint as to how I can do it. Thank you.
You can only control the boundary edge.
It's easier to


Select the top part
Extrude along normals
Check Offset Even