Yamaha MU90R Owner's Manual page 73

MULTI MODE
Portamento Parameters
Portamento is a function that creates a smooth pitch glide from one
note to another.
This determines whether Portamento is on or off for the Part. (This pa-
rameter is not available for Drum Parts.)
This determines the time of the Portamento effect, or how long it takes
to glide the pitch from one note to the next. Higher values result in a
longer pitch glide time. (This parameter is not available for Drum
Parts.)
6 4
This determines whether the Part's Voice is played monophonically
(only one note at a time) or polyphonically (up to 64 notes at a
time). This parameter is not available when the Part Mode is set to
Drum.
Height of bars indicates selected Portamento Switch setting for each Part.
( A s i n g l e b a r i n d i c a t e s " o f f " s e t t i n g , w h i l e f u l l h e i g h t i n d i c a t e s " o n . " )
Selected Part and MIDI channel
Selected Part and MIDI channel
Graphically shows Portamento Time setting for each Part.