Apple Aperture Getting Started - Manual (Page 110)

110 Chapter 9 Stacking Images and Making Picks
Splitting Stacks
You can split a stack into multiple stacks to refine the organization of your images. All
images remain stacked, but they are now part of new stacks. The image selected as the
splitting point becomes the pick for the new stack.
To split a stack:
1 In an expanded stack, select the image that you want as the first image in a new stack.
2 Choose Stacks > Split Stack (or press Option-K).
The new stack is marked with a white outline. The selected image becomes the pick of
the new stack.
Unstacking Images
At times you may decide to unstack a selection of images. When you do that, the
images that were in the stack appear individually in the Browser.
To unstack a selection of images, do one of the following:
m Select a stack, then choose Stacks > Unstack (or press Command-Shift-K).
m After creating a stack, choose Edit > Undo.
Note: When you make changes to a stack within an album, the same stack changes
appear in the project that contains the album.
Select the image you
want as the first image in
the new stack.
The selected image becomes
the pick in the new stack, which
is marked by a white outline.