The term Parameters in the Mechanical application includes CAD parameters and engineering parameters (pressure magnitude, maximum stress, fatigue life, dimension of a part, material property type, Young's modulus, and others).
While engineering parameters are indicated simply by clicking the parameter box in the Details Pane, CAD Parameters must be given some extra attention, both in the CAD package and in the Mechanical application.
The Parameter tab collects all specified parameters and lists them in the Parameter tab grids for later use and/or modification.
Also see the Specifying Parameters section for additional information.