To start planning a structure, activate a [[mallet]] or [[iron hammer]], right-click a [[tile]] and select ''Plan building''. You can extent the wall plan by additional tiles, depending on your [[carpentry]] skill. Each tile and each piece of wall needs 1 point in carpentry.
To remove a wall plan from a tile, right-click the tile and select ''Remove plan here''.
The [[maximum slope]] you can plan buildings on is a [[slope]] of 6 dirts.