You can adjust device and headphone volume by using the Sound Settings, the Quick Menu Volume shortcut, or a button action.
⚠️ To prevent possible hearing damage, do not listen to headphones at high volume levels for long periods.
Change Volume Settings
Go to Menu > Toolbox > System Settings > Volume Settings. From the Volume Settings window you can use the device volume button to adjust volume, adjust device volume, and allow prompts to be heard through the device speakers as well as headphones.
Device Volume Button
Choose to adjust volume using the device volume button and software volume controls or software volume controls only. Select the Device Volume Button on/off toggle.
When Device Volume Button is toggled ON 
, you can adjust volume using the device volume button and software volume controls.
When Device Volume Button is toggled OFF 
, you can adjust volume using software volume controls only.
Device Volume
Adjust the Device Volume setting by moving the slider button until the number you want is displayed or by selecting the + and – buttons to change the number one digit at a time. Settings range from 1 to 20. In this example, the volume is set to 10.
To mute the device speakers, select the mute speakers button. The button turns blue when selected. In the example above, the button is blue, indicating that the speakers are muted.
Headphone Volume
Adjust the Headphone Volume setting by moving the slider button until the number you want is displayed or by selecting the + and – buttons to change the number one digit at a time. Settings range from 0 to 20. In this example, the volume is set to 1.
To mute the headphones, select the mute headphone button. The button turns blue when selected. In the example above, the button is gray, indicating that the headphones are not muted.
Main Voice or Prompt Voice
Select a button to hear the main voice or prompt voice through the device speakers or headphones. When you select a button, it will turn blue.
To hear the voice through the device speakers, set Main Voice or Prompt Voice as follows:
To hear the voice through the headphones, set Main Voice or Prompt Voice as follows:
Use the Quick Menu Volume Shortcut
You can also adjust device and headphone volume from the Quick Menu volume shortcut.
Select Menu to display the Quick Menu.
Select the shortcut. Controls for device volume and headphone volume are displayed.
Device Volume
Adjust the device volume setting by moving the slider button until the number you want is displayed or by selecting the + and – buttons to change the number one digit at a time. Settings range from 1 to 20. In this example, the volume is set to 10.
To mute the device speakers, select the mute button. The button turns blue when selected. In this example, the button is blue, indicating that the speakers are muted.
Headphone Volume
Adjust the headphone volume setting by moving the slider button until the number you want is displayed or by selecting the + and – buttons to change the number one digit at a time. Settings range from 0 to 20. In this example, the volume is set to 2.
To mute the headphones, select the mute button. The button turns blue when selected. In this example, the button is gray, indicating that the headphones are not muted.
Adjust Volume using Button Actions
Use the button actions Device Volume Up, Device Volume Down, and Device Volume Mute to adjust volume quickly by selecting a button.
Adding Volume Action to Buttons
Find the button you want to use.
Select Menu > Editor.
Select Edit and select the button you want to modify.
Select the Message tab on the left and add a Button Label.
Select the Actions tab on the left and select Add Action. Action categories will be listed.
Select the Audio category.
Select Choose for Device Volume Up, Device Volume Down, or Device Volume Mute. The Action List will show the action you choose.
Select Finished and then select Save. The button will now adjust volume according to the action you chose.
Repeat these steps to create the other volume buttons.
Using the Volume Buttons
When necessary, tap your Volume Up or Volume Down button several times to reach the volume level you want. To confirm volume changes, you can view the volume controls in the Sound Settings or the Quick Menu.
When the volume is already muted, tapping the mute button will unmute the volume. To confirm, see whether the muted 
icon or unmuted 
icon is displayed in the Multi-bar.