Desktop
Open the Vivaldi browser on your desktop computer.
Open the Settings menu (gear icon).
Scroll down and select Search.
From here, you can change your default search engine for both standard and private searches.
Android
Open the Vivaldi browser on your Android device.
Open the browser menu (Vivaldi icon) to the right of the address bar.
Select Settings > Search engine.
From here, you can change your default search engine.
iOS
Open the Vivaldi browser on your iPhone or iPad.
Tap the Vivaldi icon to the right of the URL bar.
Select Settings > Search Engine.
From here, you can change your default search engine for both standard and private searches.
Prior versions on GitHub.