Samsung Galaxy S25's One UI 7 system allows you to customize side buttons, which are more than just turning on the screen or starting the camera.

Where is the side button?

"Side button" refers to the smaller button below the right side of the S25, located below the larger volume button. Whether you have the Base, Plus, or Ultra version, the button position is the same.

You might call it the "power button" because on older Samsung phones, this is the main feature of the button. While you can remap it to a power button, the power option is easily accessible via the Quick Settings panel, which you can turn on by swiping down from the upper right corner of the screen (assuming you haven't changed the default behavior of the S25).

What are the functions of the side buttons?

By default, the side button has the following functions:

• Long press and hold the button (when the phone is turned off) to turn on the phone.
• Short press of the button to turn the screen on or off.
• Double-click the button to turn on the camera.
• Long press and hold the button to open Gemini.

You can customize the latter two behaviors on the S25. While older Samsung phones running One UI 6 also offer some flexibility, such as opening a specific app with double-click, One UI 7 takes it to the next level.

In short, One UI is Samsung's unique software that provides a variety of features for your phone. Different versions support different features; at the time of writing, the Galaxy S25 is the only phone running One UI 7, but some older devices will be updated to that version in the future. To check your version, go to Settings >About Phone>Software Information.

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How to customize side buttons

To start customizing the button function of the side button, turn on Settings and go to Advanced Features >Side Buttons. Here, select Double-click or Long-press to customize the action.

Double-click

Double-click operation has the following options:

• Camera
• Flashlight
• Magnifying glass
• Voice recorder
• Samsung Capture
• Modes and Routines
• Application

Some of these options have a gear icon next to it, indicating that you can select a specific feature.

You can click the "Open" slider to completely disable the double-click feature.

For example, you can choose not only to open the camera app in the default mode, but also to “Record Video,” “Shoot Portrait,” or “Shoot Selfie.” Or for Samsung Capture, you can choose between AI Selection, Screen Recording, or Screenshots.

The "Modes and Routines" option is especially powerful because you can overlay multiple actions. For example, you can bind the button to the Sleep routine and customize it to enable Do Not Disturb mode, activate Eye Protection mode, and turn off the Always Display feature.

I personally chose to turn on the camera because it means I can take photos quickly and not miss any exciting moments.

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Long press

The long press option is limited compared to double-clicking. They are:

• Digital Assistant
• Bixby
• Power menu

By default, the Digital Assistant is Google, but if you have another provider installed, you can change it to another provider.

I'm personally more traditional-I don't need quick access to the AI ??assistant, so I chose the power menu, although I rarely need to use it. I hope One UI 7 will improve so that I can bind long presses to other features.

I am very happy with my Galaxy S25, partly because of the flexibility of its software. I don't like those useless buttons on my phone (I'm talking about you, the Bixby button), so it's great that Samsung is able to make the side button customizable without the need for a third-party app.

Samsung Galaxy S25

Samsung Galaxy S25 is a powerful and compact smartphone with a 6.2-inch dynamic AMOLED 2X display and a 120Hz refresh rate. It is powered by a Snapdragon 8 Elite processor, 12GB RAM and a 4,000mAh battery, and supports 25W ultra-fast charging.

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