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This video presents the Variation Tree, also called the Variation Stack or Variation Engine.
In the video:
• The Variation Stack is in the left dock.
• Use Ctrl/Cmd+2 to display it.
• Create, remove, and hide variations.
• Select whether to display variations using small or big thumbnails.
• Rename variations.
• Update variations as per what displays in the workspace by pressing the Update button.