LG WINE 4 User Manual page 16

Speaker
Volume Keys
Basics
Use to listen to the audio from the selected function
(e.g., music, videos, sound clips, etc.).
Use to adjust the Master Volume in standby mode
and the Earpiece Volume during a call. Use to adjust
font sizes when viewing messages, entering phone
numbers (in standby mode) or browsing menus
(except for the Main menu).
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