Nikon N6006 - Manual (Page 70)

In Shutter-Priority auto exposure mode, you can manually set
shutter speed as desired. That is, you can freeze the action
with sharp, clear images using a fast shutter speed, or aeate
motion effects by choosing slower shutter speeds.
In Aperture-Priority auto exposure mode, you can control depth
of field by varying the aperture. You can use a larger aperture
(smaller f-number) for shallower depth of field to create softer,
less distinct backgrounds, a choose a smaller aperture (larger
f-number) for greater depth of field.
In Manual exposure mode, in addition to controlling both shut­
ter speed and aperture, you can easily create intentionally
over- or underexposed photos.