The Reconstruction Mode is the easy and comfortable way to re-arrange all the buildings in your city. This function will be unlocked with the Iron Age technology Mathematics.
In order to open the Reconstruction Mode, click on the build menu [B] and then on the Reconstruct button on top.
A new menu will open, which opens you an easier way to move your buildings or re-arrange your city from scratch.
On top of your window you have a bar with three different buttons:
Those allow you to move single buildings, put buildings in a temporary stash for easier re-arrangement or leave the mode again.
Click on the store button to activate the strip mode. Now you can temporarily stash all the buildings in your city. To stash multiple buildings, just hold the left mouse button and go over the buildings.
All the buildings will be put in the Reconstruction Menu on the left side.
After stashing all the buildings you want to re-arrange, you can now build them again from the Reconstruction Menu on the left. This works the same, as from the normal building menu.
Select the building you want and place it on the desired spot in your city.
To save your progress you need to place all buildings again in your city, otherwise it won't work. If you want to revert all changes and restore your originall city, just click on the red 'revert' button .
While being in the Reconstruction Mode the timers of the buildings are running normally and will not be paused. Also the Set Buildings timer will not be reset, if you move them in the Reconstruction Mode. Other players will still see your 'old' city until you save your changes and can motivate and polivate your buildings.
Currently it's not possible to place buildings from your inventory, while being in the Reconstructions Mode, nor deleting or stashing buildings you don't need anymore. This still needs to be done outside of the Reconstruction Mode.