How do you get a crosshair type cursor with coordinates beside it?

Hi all,

This is a bit of a strange one...

My kitten is fascinated by my macbook, and was on the keyboard earlier on.. when i came back, the cursor had changed to one with a crosshair type thing with coordinates beside..

Any ideas what the shortcut is to replicate this.. im dumbfounded..
Note. ive got all the developer tools installed if that makes any difference!

neebong