Hi Nancy, there is not really any regular normals viewing mechanism set up in MoI.
Usually that is not something that you need to worry about with 3D printing, because once you form a completely closed solid, the normals will automatically get oriented to point towards the outside of the volume.
STL files are typically meant to contain closed solids in them... So usually as part of the process of generating an STL file you should be creating a completely closed object before doing the export, and once you do that the normals should get automatically oriented.
So for example instead of making just an infinitely thin plane to export to STL instead make a thin solid box.
- Michael
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