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DOYT
Maybe if I cut all the Change filament function from tune submenu and I paste it in ultralcd.cpp let's say in the Prepare menu it will appear there. i'll give it a try.
No... Don't mess with the code to do the Change Filament function.... Just duplicate this one line in the Prepare Menu. Put it higher or lower depending upon where you want it in the menu.
MENU_ITEM(function, MSG_FILAMENTCHANGE, lcd_enqueue_filament_change);
Adding this line some place in the Prepare Menu will add a menu function you can click on and do.