To move a building or decoration, tap and hold it. Tap the green checkmark at the bottom to save the selected position.
If the area under the object is red, you won't be able to place it in the selected location because there is not enough space.
The factory cannot be moved if it is currently producing something. Wait for the production to finish and try again.
You can't move grass, rocks, or trees if you can cut them out. If you want to decorate your camp with similar items, you can buy the same decorations in the shop.