F1 key resets program just like MO5 famous white little button. Selected language is displayed top right. It can be changed with L key. Below, you can read cartridge slot and tape reader contents. Bottom right, green lights indicate emulated devices.
Light is off when desactivated.
Red square indicates power on. It can be turned off to perform system hard reset. Screen last row is used to select functions with left and right arrows. On-line help is displayed in pulled down windows. Tape management is rather sophisticated.