To group and ungroup objects, navigate to the Design tab, where you'll see the Group button:
To group objects, first select all the items you want to include in your group from your Work Area. You can do this by holding down the Ctrl key and, without letting go, clicking on each object until you have all of them selected or by using your mouse to draw a selection box around the objects you want to include. Next, choose Group Objects from the Group button found in the Design tab. To ungroup an object that is grouped, select it and choose Ungroup Objects.