Yes, on the away stroke, (away from you), 2nd photo, you can torque the blade by pushing the thumb. down on the corner.
On the return stroke, (back to you), 3rd photo, push the corner, up to increase torque on the edge.
Use a relaxed grip so you are not pushing down on the strop. It takes a little getting used to.
The flip becomes a roll of the thumb, like flipping a switch.