Thank you for choosing Flash Forge 3D printer.
If you bought the Dreamer 3D printer, please read page 17 of user guide about loading/unloading filament.
If you bought the Creator Pro 3D printer, please read page 15 of user guide about loading/unloading filament.
If you bought the Finder 3D printer, please read page 26 of user guide about loading/unloading filament.