If you are trying to build a special graphic by using multiple drawing objects, it is possible to layer drawing objects by ...

If you are trying to build a special graphic by using multiple drawing objects, it is possible to layer drawing objects by adjusting their Color (No Fill), Position, and Text Wrapping.  These commands are available on the Format tab after you have inserted a new drawing object. You may also want to adjust the z-order (Order command on the drawing object's context menu).