Depending on what unit system was used when a part was saved, a mismatch in actual size may occur when loading it into Netfabb. Use the Convert Units command to correct this. Either convert from inches to millimeters to effectively scale the part down, or convert from millimeters to inches to effectively scale it up.
Tip: If all you want is to change
Netfabb's display units, not rescale your part, you'll find the option to do so at
System > 
Settings > General > 
Unit of Length.
Settings > General > Unit of Length.
To convert from inches to millimeters
- Select the part.
- Click
Modify > Convert Units >
inch to mm.
To convert from millimeters to inches
- Select the part.
- Click
Modify > Convert Units >
mm to inch.