Yamaha Mark IV Operating Manual page 32

3 Tap on the desired point on the [MIC Volume] bar to
adjust the volume of the Microphone's input.
4 Tap on the desired [Reverb Type] button, and then tap
on the desired point on the [Reverb Depth] bar to
adjust it's depth.
5 Tap on
The [MIC Setting] screen is cleared.
.
Chapter 3: Basic Playback
31