Yamaha MMP1 Operation Manual page 35

4. Screens
4-1-8h. Global tab/IO Label
This window is used to add names (labels) to MMP1 I/O connector I/O signals.
Label
Double click to set each input/output signal name. Enter a channel name up to 17 alphanumeric characters and symbols.
NOTE
Names set here will be used as the signal names assigned to inputs and outputs on the Monitor Matrix screen, the Patch screen, and other
screens.
MMP1 Operation Manual 35