MDI window can be opened from F2 - Program & MDI screen using CTRL+M or by clicking on the MDI button towards the bottom left of the screen.
MDI window can be used to quickly run any gcode commands and the on-screen buttons can be used to control outputs or move the axis to the home position.
When using the touch screen keyboard the Enter button is disabled and the Run Button in the MDI screen used to execute the Gcode command. This is to prevent the Enter button being pressed by mistake when using the delete button as they re next to one another on the screen. This does not apply when using an external keyboard where pressing the Enter key will execute the Gcode command.
In MASSO G3 the up and down arrow key can be used the select and execute commands from history. The last 20 commands are saved in memory.