Kind of depends on the beach. Main thing I mess with is the preamp gain and ac sensitivity. Here you can run a max preamp gain which is 4. If you are close to the wet saltwater it is a lot trickier than up in the dry sand.
If you go to the Whites forum under programs you will find many programs for the DFX. Its a great place to ask about your detector also, many people that know what they are talking about and very willing to help. Like this forum only just for Whites.