Please ensure your 3D model meets the following printer-specific requirements: File Format— Your 3D model file must be saved in STL (binary.stl) format. Make sure to export your design in "millimeters ...

and you can also use the built-in 3D model viewer not just for STL and 3MF files but for G-Codes as well. The viewer is quite powerful and features several different view modes, so you can inspect the ...