Place the model with the design to the bed. (Disable the touch sensor at the beginning of the print or place the model where it does not make the check)
Save the 3MF file and make 2 copies, one for each colour.
Open the “red copy”, split the model into parts and print the red layer without moving the coordinates of the model.
Change the filament to the 2nd colour.
Clean any filament string and make a home if necessary but do not move the bed plate.
Open the “white copy”, split the model into parts and print the rest without moving the coordinates of the model.
If you want the keychain to be 2 faced, mirror the model, repeat the process and glue them later.
Dexelon
