In the drawing area, select the group to modify. If the group to modify is nested, press Tab until the group is highlighted, and click to select it.
Click Modify | Model Groups tab or Modify | Attached Detail Groups tabGroup panel (Edit Group).
Note: Depending on the double-click action specified for Groups in Options, double-clicking the group may also enter edit mode. See User Interface Options.
On the Edit Group panel, click (Add) to add elements to the group, or click (Remove) to remove elements from the group.
Select the elements to add or remove from the group.
Note: If you add a view-specific element to a model group (for example, a window tag), the view-specific element is placed in the project view and not in the model group.