Final answer:
A drywall hammer is used to compress the face of a gypsum panel to create a dimple for the nail head, not for wedging or prying panels.
Step-by-step explanation:
According to The Gypsum Construction Handbook, a drywall hammer is used to compress gypsum panel face and leave desired dimple. This tool is not typically used to wedge panels or pry them apart. Its primary function is to allow a worker to effectively fasten drywall panels to the framing with nails. The dimple created by the hammer is a slight indentation that ensures the nail head is below the surface of the drywall, which allows for an easy application of joint compound or spackle over the nails to create a smooth, finished surface.