There is one input variant with numerical finishing. This can be used for a single wall or a complete building contour. After you have inserted the walls as a "preview", you have to go through the walls and edit the length and direction. To start this process, insert your walls and press ESC on your keyboard. Now the numeric toolbox for a wall contour appears in which you can set the needed values depending on the wall side. As long as you edit the walls they are shown as a preview and not yet part of the project until you finish the toolbox input .