For the town decorations, there is no way to rearrange them once you've put them in a certain place. However, you can buy a demolition order from the general store (costs 100 coins) and get rid of the upgrade in the unwanted place. Sadly, you'll just have to buy the upgrades again and put them where you want them.
About the picture thread, that is a great idea! If you want, you can start one yourself!
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"Don't cry because it's over. Smile because it happened."