>>2879178When in manual focus mode, the camera shows you your DoF for your given aperture and focusing distance on the scale on the left. Play around with that to find a combination you like and then set the snap focus distance to match that. I like setting it just a little bit short of hyperfocal range wide open (if I remember right, mine is set to 2.5m or 3m), that way if I snap-focus with the lens wide open I will probably have everything mostly in focus, and if I snap-focus at f/4 or f/5.6 or so then pretty much everything will be in focus.
Snap focus mode is pretty simple. In the settings, you pick a focus distance to be your snap-focus point. Then, when you're using the camera normally in autofocus mode it'll just focus like normal and ignore your snap setting UNLESS you mash down on the shutter button really fast without giving the camera time to autofocus correctly. When that happens, it skips the autofocusing process and immediately goes to your chosen snap-focus distance and takes a photo. It happens pretty much instantly, so it lets you fire off a photo at the exact instant that you want it instead of having to wait for the camera to finish focusing.