Property sets upper left corner of the object relatively to the container.
Element position can be changed with the mouse pointer or on the Property grid.
Example of the changing element position for Shape element:
Note 1: X coordinate equals 0 and cannot be changed.
Note 2: “Snap to Grid” option defines if the object “sticks” to the grid or not when its position is changed with the mouse pointer. Click the button on the Toolbar to turn on\off this option.