Combining objects
In contrast to grouping functions, combinations create a new object; subsequent “un-combining” in the same manner as ungrouping is not possible. Select a collection of objects, then right-click and choose Combine from the pop-up menu.
After you have selected more than one object, the Merge, Subtract, and Intersect functions can be reached in the Modify > Shapes menu or though the group’s right-click menu under the heading Shapes.