To find the (x,y) coordinates of a spot in the image:
1) Click on the image to stop the tour rotation
2) Hit the "H" key on your keyboard. In the lower-left corner of your browser window (the status bar) will appear the message, "Click Mouse to display X,Y coordinates". If you don't have a status bar in your browser window, go to the menu View > Status Bar to turn it on.
3) Click on a spot with your mouse. (Don't click on an existing hotspot, but on a new spot where you'd want to add a hotspot)
4) The X,Y coordinates will appear in the status bar at the lower lefthand corner of your browser window.
To find the pan, tilt, and FOV values for a particular view, adjust the view to your preference, then hit the "V" key on your keyboard. The pan, tilt, and fov values will appear in the status bar.
NOTE: To see the source code needed to add the hotspots, go to View > Source.