Move the layer preview bar to a height (the above number is the layer number, the below number is the height)
Right-click on the preview bar and choose "Change Filament" - "Filament 2"
Move the layer preview bar to a height (the above number is the layer number, the below number is the height)
Right-click on the preview bar and choose "Change Filament" - "Filament 2"
Click "Slice" to get the latest preview
Export the gcode file
Please note that you don't need to manually switch the filaments during 3D printing, as you have already set and sliced with dual colors, the printer will switch the filaments automatically.
But please make sure you load the correct filaments:
If you use Light-tight White filament, please select the "PES White (Light-tight)" filament preset and load it into the corresponding extruder.