I cannot deselect all of the three options in this panel or in the toolbar , I wonder what I am doing wrong.
Thanks for any help
Convert the rectangle to a curve (CTRL+Q, or...Object menu>Convert to Curve). I know that sounds strange, but essentially when you are drawing with any of the shape tools (Ellipse, Rectangle, etc.) you remain in "shape mode" until you convert the object to curves. What you are seeing on the Property bar is corner shaping, which is only available when you are in "shape mode."Patti
You are in the "Normal" corner mode already. If you have 0 size in the inputs then you have square corners. As Patti explains the little icon is irrelevant unless you select the shape tool.