What the coil transmits is normally fixed, with transmit boost being a rare exception, where you can boost the voltage applied to the coil. Sensitivity or gain controls are therefore filters applied after the fact, that amplify or filter the signal from the coil in various ways. Most detectors have a single control that you actually don’t know what’s really going on, unless you experiment with it to see what happens. It’s a possible blend of functions in one control. The White’s V3i gives y