Stop Cubase Sustain, Release or Delay Notes Won't End Quickly

I know I saw this somewhere but can’t find it again. I’m using Prologue to find a sound I want. When testing, I’ll often try knobs and buttons at their lowest and highest settings to understand the impact to the sound. Sometimes, when I try max sustain, the note will take for-e-v-e-r to stop, lol. I have to wait it out or close the project and come back in. How do I make it stop? My current example is Cubase Pro 10.5-Prologue Track-Lead Organ Preset-Sawtooth-max delay and release. Thanks for any help!