soft key
noun [ C ] computing specialized uk/ˈsɒft ˌkiː/ us/ˈsɑːft ˌkiː/
（手机或键盘上的）软键，功能键
a key on a keyboard or a button on a mobile phone or other piece of electronic equipment that can be programmed to do different things
The soft keys are labelled F1, F2, etc. 软键上标有F1、F2等。
The user can choose the relevant service with one touch on the soft key below the display. 用户只需轻触显示屏下方的软键，即可选择相关服务。
- More examples
- You can select the reload page option via the left soft key.
- There are customisable soft keys on either side of the navigation.
- The instrument's parameter can be selected manually from the control panel's soft keys.