Yamaha SY85 Owner's Manual page 93

Hi (High velocity limit)
Range: 1 ... 127
Controls: [CS2], [CS4], [CS6], [CS8], [-1] [+1], Dial,
[SHIFT]+keyboard
Sets the highest velocity value for a range of velocity values over which
each active layer will produce output.
Use the [CS2], [CS4], [CS6], and [CS8] sliders to set the high velocity
limits of the A, B, C, and D layer voices, respectively. It is also possible to
play any note on the keyboard at the desired velocity while holding the
[SHIFT] key.
See the "Lo" parameter, above, for more details.
PERFORMANCE EDIT MODE /
1:Layer 21