Ok, thanks. It helped me.
Further in this regard, when Grid button is selected on main toolbar and we draw a new line, point, arc etc., we can see the (x,y) coordinates for its starting and ending points. But the lines and arcs drawn already, when we select them, we see their length (radius in case of arc) and angle on the Ribbon bar and not the (x,y) coordinates.
We can find their x,y coordinates only by right clicking on them and selecting "Properties".
Is there any way that we can see (x,y) coordinates of drawn lines and arcs on the Ribbon bar?