In the Column Properties editor, I try to reset the physical column order with its logical column order and I found that the Reset Order icon is grayed out and disabled. Why is that disabled, and how can I enable that?
That is because the Sort is set to AZ Alphabetic or ZA Reverse Alphabetic, which disables the Reset Order icon. If you change Sort Item to either column order or physical order, then the Reset Order Button will be enabled. Then you will be able to press the Reset Order Icon to select Reset Order to Match Attribute Order, which will reset the physical column order with the logical column order.