All rectangular shaped elements have got a position (the line-shaped ones like linear mover and light barrier are an exception). The position indicates the corner that is the nearest to the origin. Normally it is indicated in absolute coordinates concerning the origin, but you can change this with the cross.
You can change the position of an element in the edit mode by entering the new coordinates in the edit mask, or by dragging the element with the left mouse button and dropping it at the desired place. If the element has got children these will follow the movement.
You can also shift several already marked elements at the same time with the mouse. But then there must not be any fixed element in the selection whose father is not in the selection as well.
The position will also be changed implicitly by changing the size with the mouse if the corner that is selected for the size changing is the position corner or if it is fixed to this one directly.
The picture above is only two-dimensional for reasons of clearness.
See also :