Howdy georgemohr--
First, welcome to Findmall.
Georgemohr, we all have our own hunting styles and hunting goals, I'll give you a brief explanation of my style. When I approach a site I first imagine what type of finds I may recover and what type of finds I HOPE to recover. With my goals in mind I make certain that I am accepting the VDI'S of desired targets and possibly rejecting certain trash target VDI's. An example of this: I located a half of a city block that in the 1950's had 2 houses and a tavern. The entire area had been cleared and the debris hauled away. I visualized silver coins, jewelry , and possible relics of that era and before. The challenge of this site was the trash! The screw caps and other types of trash made the site almost unhuntable. My solution was to reject VDI's +74 and below. I realize that I left behind Indian Head cents, nickles and much jewelery but I was able to dig wheat cents, silver dimes, quarters and half $'s. In a nutshell before turning on your detector imagine what targets you are likely to encounter then set your accept/reject accordingly.
Georgemohr, other setting adjustments are made (if needed) on the fly at the site. For me the most frequently made adjustments are Sensitivity (RX Gain), Recovery, Bottle Cap Reject and Filters. I make certain that these adjustments are on my Live Search Screen for easy fast access. There is no need to be "overwhelmed" with this detector. In this post I have mentioned the key adjustments that affect performance, with practice and experience you will fine tune your V3i to suit your sites and goals. Best of luck and...
Happy Hunting!
Blind Squirrel