Sorenson ntouch VP2 - How do I show the in-call audio level meter?; Displaying the In-Call Audio Level Meter

How do I show the in-call audio level meter?
Step 1. Start at the Home screen as shown below.
Step 2. Select the Settings button to open the screen shown below.
Step 3. Move to the Device Options button as shown below.
Step 4. Select the Device Options button to open the screen shown below.
Settings button
Call Options button
selected
Device Options button
selected
Sound Options heading