m_pitch
This variable sets the level of precision when the mouse is used to make the player look up and down while the +mlook command is in effect. By default this variable is set in such a way that moving the mouse forward makes the player look up and moving the mouse backward makes the player look down. Some people prefer to have this movement inverted just like it is inverted for airplane controls. If you wish to use this inverted mouse movement then you should set this variable to a negative value (for example "-0.022"). It is a matter of preference which movement method is used by players. Also lowering the value for this variable will increase the level of precision when the mouse is used to make the player look up and down. This variable can be used separately from the sensitivity variable to provide greater control over the mouse sensitivity for movement along the pitch. It is advisable to keep the value for this variable constant at 0.022 or -0.022 and instead use the sensitivity variable to change the overall sensitivity of the mouse. Also, some script writers lower the value for this variable along with a lowered value for the fov variable in order to provide more precision when the fov variable is used to zoom.