My house has a guest bathroom that has a shower/tub combo, but I realized there seems to be no way to get the water to come out of the showerhead instead of the faucet. There is a volume and temperature control which is identical to the one in the stand-up shower, but nothing on the faucet to pull up to control where the water comes out. There's nothing on the showerhead either. All I can figure is the previous owner swapped out some hardware when they left, but I have no idea what. Is there some easy fix to this? Am I a moron and missing something obvious?