I think you're referring to the part of the game where you can rearrange your town. If you grey out the buildings then you can rearrange decorations without having to worry about tapping the building...
Thank you everyone who replied. Please don't be surprised if I ask any of you to friend me in the game, I've just started and need some. I am in Australia so will be logging in outside your normal hours, but I am playing every day. Cheers Kim
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