How to Open the Power Menu with the Side Button on Samsung Galaxy A57

Open the app screen and tap Search

Swipe up from the Home screen to open the app screen, then tap the Search bar at the bottom. The search screen opens with suggested apps.

Open Settings from the suggested apps

On the search screen, tap the Settings gear icon in the Suggested apps row at the top. The main Settings screen opens.

Tap the Settings search field

In Settings, tap the Search field at the bottom of the screen. The settings search screen opens with the keyboard.

Search for side button and tap the result

Type side button. In the results, tap the Side button entry listed under Advanced features. The Side button settings open.

Tap Long press

On the Side button screen, find Long press. It currently reads Digital assistant (Google). Tap the Long press row to change it.

Select Power off menu

On the Long press screen, select the Power off menu option. Its radio button fills, replacing Digital assistant as the long-press action.

Confirm the side button now opens the power menu

Go back to the Side button screen. Long press now reads Power off menu, so pressing and holding the side button opens the power menu.