2010 Ram 1500 has 4WD and 4WD/AUTO on dash but no switch to activate it?

My 2010 Ram 1500 shows on my dash 4WD and 4WD auto and 4 Low and O / D OFF but there's no switch anywhere in the truck to activate it? I know there's supposed to be a switch you can use to go from lock to 2wd and neutral and all that but idk why mine doesn't have that? And if possible can I have one...