I am using the 3-panel slider from the USA library. Obviously, 2 panels slide while 1 is fixed. This is displayed correctly on the floor plan. However, in the elevation view, the opening line only appears on 1 panel, instead of 2 panels (see attached). I've searched through the settings, but can't seem to find an option to turn on the opening line for the second panel. Am I missing an option or is there another workaround?