Animation parameters rollout: in this section you can add or remove surface parameters. These parameters are numerical variables defined in global scope. After adding a parameter it will appear in parameter rollout on modify panel. You can change the value directly form that rollout.

To add new parameter click on button.

To delete a parameter use Right click and choose delete option from the menu.

To edit existing parameter simply press the button with the name of parameter.

Animation parameter Dialog: here you can set a new parameter or edit existing parameters.

Parameter Name: set the name of parameter.

Value: set the current value of the parameter.

Left Limit: set the minimum value of parameter.

Right Limit: set the maximum value of parameter.

Note1: All parameters are accessible in global scope with the same name.
Note 2:  The parameter name could not be same as global variables in 3dMAX and Mathsurf and cannot start with the number and signs. See the global variables in Mathsurf