If you want to remove everything you've built from an island in Creative, go to My Island > Tools and click Reset Island To Original State, then click Confirm. This will remove everything you've created and restore the island to its original state. This is useful if you're not very deep into your island's creation, and just want to start over, and this is faster than exiting the island, deleting it, and creating a new one.
Reset Island
If you want to remove everything you've built from an island in Creative, go to My Island > Tools and click Reset Island To Original State, then click Confirm.
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