on-screen button
nounUK /ˌɒnˈskriːn ˈbʌtən/
US /ˌɑːnˈskriːn ˈbʌtən/
A small picture on a screen that you press to make something happen.
Tap the on-screen button to start the game.
RELATED WORDS
OTHER MEANINGS
2. A clickable control shown on a computer display that performs an action when selected.
Click the on-screen button to save your file.
3. A graphical element in a mobile app that users press to trigger a function.
The on-screen button turns the camera flash on and off.
4. A visual prompt on a device display used instead of a physical key.
Use the on-screen button to adjust the volume.