Blender's import scale and units I want to import STL files which I know to be in mm, but blender displays it in meters. I know that I can change the units in properties-&gt;scene, but this converts the the units (1m-&gt;1000mm), so it's no good.
There is a scale option when I import and I can rescale post import, but I am relectant to do this, since I don't want to multiply and divide large factors on stl files, as this tends to degrade precision from rounding errors.
I actually just want to change unit symbol with no change in the underlying numbers.
Choose unit scale that you like:

0.001 if you need to scale meters to millimeters.