Bit hard to explain but I need help with limiting the parameter in Massive

IMG01

What I want is to limit the range of Scream parameter as marked by Env1 where MIDI input value at left side at 0 and right at 127.

When I'm using a knob on a midi controller, rather than turning the knob to find the precise value of the sweet spot, if I have those sweet spot set to 0 and 127 I can just turn the knob quickly to min and max value to get the value I want.

I'm not sure what to search for in the manual as well so I'm hoping one of you will know how to do this.

I hope that make sense. Thanks.