The machine was controlled by a special remote, its function buttons overridden.

Its main forms of input were a tiny 8-direction joystick and 6 function buttons.

Controllers also have auxilliary function buttons for additional model features such as lighting and sound.

It had a standard typewriter keyboard and assorted extra function buttons.

Extra function buttons were added bringing the total to four, two of which are on the touch screen.

Touch a function button, and the unit wakes up instantly.

At the same time, he pushed one of the main function buttons on the zone-implant control.

When inserting the new sheet of paper, don't press the function button.

The music volume control, a microphone for the cellphone and a function button are all on a remote box.

The new 6021 combined control unit & locomotive control with additional function buttons.