FlashForge Adventurer 3 Pro 2 3D Printer - Manual (Page 31)

2.4.5 Model Removal
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As shown in the picture, grasp the handles
on both sides of the platform directly with
both hands, and pull outwards to remove
the build platform.
When printing is completed, the extruder and build plate may still
be hot. Please start operating after cooling down!
Notice
Please remove models after the platform has cooled down. If models are removed
when the platform is not completely cooled down, bubbles will occur on the
surface of the platform.
It is recommended to take the platform to the outside of the equipment for model
removal, otherwise the model debris will remain in the equipment. Please keep
the inside of the printer clean.
Please use the back side of the build plate when printing with PETG.