Want to change your island's layout and find the perfect spot for a new workshop or house? It's very simple!
Activate move mode: Press and hold your finger on the object you want to change.
  Adjust the object: The following will appear around it:
Move and rotate: Drag the object to a new empty spot. Press the arrow button to change its orientation.
Confirm: If the new location suits you, press the green button (✔) to save the changes.
Cancel: If you change your mind, press the red button (X) to cancel the changes and return the object to its original place.