If the radio button "Crescent position" becomes a rectangle within of the insert. The insert is deformed by rotating it at the centre of the rectangle. The rectangle is placed by pressing the left mouse button on or next to the insert in the active workspace and selecting an area.

The rotation is performed with the combination Ctrl key + left mouse button and can be performed for the (forefoot) or (hindfoot) areas. The decisive factor here is the position of the mouse pointer in relation to the defined rectangle.