Upon clicking on one of the above mentioned features, you will be redirected to the Knowledgebase-Article dedicated to this feature.
The Settings of Lenovo Nerve Center (accessible through the Gear-Symbol in the top left corner) provide access to General Settings and Hotkey Settings. Under General Settings, its possible to set whether games will get started in Enhanced Mode automatically, whether the software will start in the background on startup and whether the Nerve Center Icon is going to be displayed in the Windows Taskbar:
Under Hotkey Settings, you can assign specific key-kombinations in order to initialize one of the four features - Audio Enhancer, LED Control, Network Priority, OSD Quick Switch (On-Screen Display Quick Switch):
Lenovo Nerve Center can be downloaded from the following Link from the Lenovo Support Page.