You can organize dimensional and user-defined parameters into groups, and control whether they are displayed in the Parameters Manager list.
When many dimensional and user-defined parameters are defined in a drawing, it can be useful to use the Parameters Manager to create several parameter groups, and then assign the parameters to one or more of the groups with a simple drag and drop operation. The result lets you view one group of parameters at a time, organizing and limiting their display in the Parameters Manager. Thus, parameter groups are used as a display filter for the parameter list.
Expanding the filter tree in the Parameters Manager displays all group filters created in the current space, Model space or a layout. There are two predefined filters displayed in the filter tree that cannot be edited:
When you use the Invert Filter option, it will display all the parameters not in the group instead of displaying only the parameters belonging to the group.