Yes you can. Changing the thickness of an existing wall is easy. First, remember that walls can only be added or modified when on the Layout tab on the main design menu.
- Click the Layout tab.
- Click Select from the design tools on the left.
- Click on the wall that you wish to change. The wall's properties are displayed under Dimensions displayed in the options menu on the right of the design area.
- Change the thickness value to update the thickness of the selected wall.