A Newman projection is a diagram used to depict a specific conformation of a molecule.
eg. 1: Staggered conformation of ethane
To draw the staggered conformation of ethane as a Newman projection look at the molecule from the point shown above. The front carbon atom and the three carbon-hydrogen bonds originating from it are seen.
The rear carbon atom is not seen, but the three carbon-hydrogen bonds originating from it are.
This is the Newman projection of staggered conformation of ethane.
eg. 2: eclipsed conformation of ethane
see also saw-horse formula