Walls can be drawn in any direction.
Changing the External Side option allows you to do this:
- Click the start point for the wall.
- The ARROW ↑ tells you which side is the external.
- To change this, at the top left of the screen there is a option that says External Side.
- Click the arrow next to External Side.
- Now select which side you want the arrow to go.
- You can now start to draw your wall.