First of all welcome to the forum. Since you have only posted once, I am making the assumption that you may just be starting out MDing. Apologies if this is not the case and you are more experienced, but since you have given us nothing else to go on, that is my assumption.
Second, try also posting in the Whites forum for more targeted advice from Whites users
Third, try giving us a little more background as to where you are detecting (e.g., beach (salt or fresh), park, plowed field, type of soil (mild or mineralized), whether the area is trashy with iron or foil). That will help with getting relevant advice like level of discrimination and whether you want to go with all metal or disc mode and adjustments to recovery speed.
Going deep is NOT the end all and be all of detecting. All metal mode typically gives you the deepest response but may not be desirable if you are searching in a trashy or iron infested site. Under these conditions it may be more important to emphasize target separation which may necessitate that you give up some depth. Metal detecting is all about tradeoffs.
OK, back to your question, the plain vanilla answer is:
Use coin and jewelry mode.
Ground balance the detector on neutral ground and lock the GB reading.
Set Discrimination to null out iron. If you go higher, you can null out aluminum but then you risk nulling out nickels and gold items. Best to minimize discrimination to the extent necessary (i.e., iron). Setting discrimination too high can also potentially affect the depth that you can detect a target even if it is not discriminated out.
Set threshold to where you can just hear it hum.
Set sensitivity to the maximum that does not give you noise due to local interference. Another balancing act. High enough to get max depth but not so high that you get noise or overloads from shallow trashy targets.
Tone ID: I use 20 tones myself so that my ears can primarily help me determine whether to dig. You can go with fewer tones, but then you become reliant on the display to give you "dig - don't dig" clues. 20 can be unwieldy for the newbie, so primarily using the display to decide may be more suitable if you are just learning - so go with 4 tones.
Have fun and HH.
