Hello you all, I thought it would be OK to chime in.
Are you referring to the re-tune window, or is it something else? When you release the Pin Point button, instead of going immediately back to Discrimination, you enter a time window called re-tune window.
During that re-tuning time you will see a "t" displayed on the screen. The re-tune window's is about a second long.
While you are in the re-tune window, the Eurotek Pro gives you a chance to approach the coil to the target and press the Pin Point button again before going back into Discrimination mode. It will then narrow your search width to the position of the coil. You can repeat the procedure several times until your search width locks right on top of your target.
To test it, press the Pin Point button and get a target close to the coil until you get a sound. Then, release and press the pinpoint button quickly. You will notice your target sounds only when is closer to the coil than what it was before. Repeat the operation until you can only hear the target when is right on top of the coil. In real practice it will help you narrow your search and bring your coil directly on top of your target.
When the re-tuning window expires, the Eurotek Pro displays a "d" for a moment indicating that it is now entering Discrimination mode.
You are all correct -- the feature is also there in the frat brothers and the Gold Bug.
Hope that helps!
---
J. Anton Saad