Some layers have sub-layers within themselves. The sub-layers of these layers are listed in the Layer settings dialog, Drawing Details tab. Sub-layers that are not wanted to be seen in the drawing can be turned off from the drawing details tab.
Drawing Details Dialog
Click the Layer icon in the ribbon menu .
Click on the Drawing Details tab from the layer settings dialog.
You can turn on/off the sub-layers from the drawing details. The table below shows the display ways of the lower layers in open and closed conditions.
Click on the box to mark it.
Click on the box to uncheck it.
The table below shows the column drawing of the column hatch sub-layer in open and closed conditions.