New in v1.5 Crosshair supports an additional mode where you can see real-time distances between screen elements.

You can toggle the Real-time distance mode with the ` key.

As you move your mouse around the screen, you will see the distances between screen elements. The distances are calculated by looking at edges of the screen elements.

In the above picture, you can see the distance between the edges of the address-bar control of Safari.

You can also control the sensitivity of the screen-edge detection using the + and - keys.