Update page 'Swapping Tiles'

Swapping-Tiles.md

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+Through the fact that tile territory has many different tile types, there must be a way to change them. And there is one called swapping.
+To swap a tile, select the tile(s) you want to swap and go the sidemenu in the building tab. Now simply select the new type you want your tile(s) being swapped into. A swapping animation starts now playing, indicating you the swapping process.
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