"M" Position
WARNING: This page is about a different car, the 2004 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.
When the selector lever is put in the manual shift gate side, the fixed changing gear line is set. Move the selector lever to + side or - side and switch the manual mode switch, it changes the speed gradually, and changing the speed like the M/T models becomes possible on the set changing gear line.