Display Hub+ voice volume settings can be adjusted from the Frontpoint app. To change the the voice volume on the Display Hub+, follow the instructions below:
From the home screen of the Frontpoint app:
Tap on the right arrow within the Security System section
Tap the Gear icon at the top right to open the Settings menu.
Tap Speaker Level.
Under Voices Volume adjust the slider to the desired volume level.
Tap on Save at the top right.
For instructions to turn off the voice announcement or switch to a beep chime by sensor, while still keeping the voice volume for arming announcements, see "How do I change a sensor's chime or switch to vocal announcements on the Display Hub+?"