Subcategories

Within each category can be many subcategories that let you control graphics with finer precision. This is what makes the concept of categories so much more powerful and natural to work with than layers. For example, looking at a door, you can see that the category Doors (Figure 2.6) has a set of subcategories that relate to sub-elements in the door assembly. For example, you see Elevation Swing, Frame/Mullion, Glass, Opening, Panel Swing, and any other user-defined elements that can be made when creating a door family. Each subcategory can be assigned an independent line
weight, color, and pattern.