Work with stacks in list view
If you prefer, you can create and work with stacks in list view. You can select photos to stack, select a pick, add and remove photos, and split stacks, just as you can in filmstrip view and grid view.
In list view, a stack is identified by a disclosure triangle beside the name of the pick photo.
Open and close stacks in list view
Click the disclosure triangle beside the name of the pick photo.
You can work with the photos in a stack in list view by dragging, pressing keyboard shortcuts, or choosing commands from the Stacks menu.