selectionbutton
nounUK /sɪˈlɛkʃən ˈbʌtən/
US /sɪˈlɛkʃən ˈbʌtən/
A selection button is a button you press to pick something.
Press the selection button to choose your favorite color.
OTHER MEANINGS
2. A control on a device that highlights or activates a chosen item.
Use the selection button to highlight the song you want to play.
3. A key on a remote that confirms a highlighted option.
Press the selection button on the remote to open the channel.
4. A clickable element in software used to choose one option from several.
The selection button lets you switch between light and dark mode.