Could you do a gold search for me?I tried answering your PM earlier today, but Internet was almost stopped completely. It just posted, maybe put that here also... somebody else might need this.
Yes, back in 2016 rectangles were used to indicate deeper than surface hits. Then circles were more near surface or less than 2 ft deep. Red was used to identify a general non-specific metallic signal. I don't use that depth marking system now, because the deeper general (red) often indicate minerals or even caves. I use a different search for caves/tunnels marked usually in white. For native or man made gold a specific search is done now also. Gold searches are hard to discriminate out native gold or loose gold coins not in a cache.