Utilities for finding x/y screen coordinates

For Windows you can use Point Position :

The way to use the application is very simple:

• Move the window by putting your mouse cursor in the cross which is in the middle of it, and point one of the four corner arrows into the place of the screen you want to define.
• Then push the button corresponding to the pointing arrow.
• The text entries will take the color of the button, and they will show you the exact pointing position.

Point Position (for Windows) is a simple tool that lets you pick the coordinates for any point on your screen (using X,Y axis). Simply point one of the four corner arrows at the spot on your screen that you want to define and click the button to display the X/Y coordinates.

Point Position is freeware.

For Macintosh, use the built-in screen capture function. Press Command-Shift-4 to take a picture of part of the screen. The cursor switches to a crosshairs cursor that includes the x/y screen coordinates. Press ESC to cancel the operation