Samsung Galaxy M30 User Manual page 53

Basics
Using quick setting buttons
Tap quick setting buttons to activate certain features. Swipe downwards on the notification
panel to view more buttons.
To change feature settings, tap the text under each button. To view more detailed settings,
tap and hold a button.
To rearrange buttons, tap → Button order, tap and hold a button, and then drag it to
another location.
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