I'm new to the v3i and metal detecting. I have been using it for about 2 weeks and have had good success. However on pg 19 of the guide it briefly goes over "Size", I have read it several times and I still do not understand......can someone explain how size of an object is determined and what is meant by dots across the bottom of the screen.......I have tried placing objects and determining their size, but I must be doing something wrong or I don't understand the 2 inch default they discuss. Thanks