select your model, use the keys 1, 2 and 3 to increase DISPLAY resolution.
Note: Display rez is not the same as you will see at rendering tho .. You can change the render resolution in the Attribute editor under tesselation settings.. Theres an option there where you can turn on the tesselation in the viewport so you can see how it will tesselate/triangulate your model during rendering.
Senior 3D Artist,
Maya Software Manager & Maya Instructor
LEGO Systems A/S