When you select multiple shapes and then click a menu command, the result depends on:
When you work with multiple shapes, the primary shape determines:
The primary shape is determined by the selection order or the stacking order.
When you select multiple shapes by pressing SHIFT and clicking each shape , the first shape you select is considered the primary shape, and is indicated by a thick magenta outline.
When you select multiple shapes by dragging a selection net (selection net: A means of selecting more than one shape at a time by dragging the Pointer tool to define an area that encloses all the shapes to be selected.) around them, the primary shape is the one at the back of the stack (the first one that you dragged onto the page).
When you select multiple shapes by clicking the Select All command on the Edit menu, the last shape dropped on the page becomes the primary shape.
The stacking order of the shapes on the page determines how a command affects multiple shapes in a selection. The first shape you add to a page is at the back of the stack; the shape you added last is at the front. Stacking order determines:
When you select multiple shapes by pressing SHIFT and clicking each shape, the stacking order doesn't affect the selection order. The first shape you click becomes the primary shape.
Shapes on a background always appear behind shapes on a foreground.Layers have no effect on stacking order.
Note When you resize, move, rotate, or flip a selection that contains multiple shapes, that action is performed on the entire selection as a whole, not on the individual shapes within the selection.