How do you find X/Y coordinates and how do you set the reference point?

Hello,

I'd like to know how to see the X and Y coordinates of an object on a layer. I have a button on a layer, and as I move the button, I want to see the X/Y coordinates of the top-left corner. When I move the button, nothing is displayed in the Info palette concerning the coordinates: The X and Y fields are empty. The only way I can see the X/Y coordinates changing in the Info palette, is if I run my cursor over the image.

Also, if it is possible to see the coordinates, how do you specify for which reference point you want the information? In Illustrator, you can select an object, look in the Transform palette, and select the x/y reference point you want to see.

This is what the Photoshop help says about coordinates:

When the Line tool, the Pen tool, or Gradient tool is being used, or when a selection is being moved, the Info palette displays the x and y coordinates of your starting position, the change in X (DX), the change in Y (DY), the angle (A), and the length (D) as you drag.

Thanks for any tips.