In fact in the window where we can select the machine in mGalaxy
Nitendo > Nes > Snes >GB > ...
^
Sega > SMS > Genesis > GameGear > ...
^
Atari > Atari 2600 > atari 5200 > Atari 7800 > lynks > ...
^
Arcade > Mame > Taito X > Cave > Zinc > System 3 > ...
^
.....
^ Mean up and > right