For multi extruder 3d printers - Marlin lcd menu

if your 3d printer has more than 1 extruder n lcd menu there is no
option to move other extrudes than the first one.
Marlin lcd menu tree: main menu - prepare menu - move axis menu - move
1mm or move 0.1mm - Extruder, Extruder2 (if available), Extruder3 (if
available)