Filters provide a way to override the graphic display and control the visibility of elements that share common properties in a view.
For example, if you need to change the line style and color for 2-hour fire-rated walls, you can create a filter that selects all walls in the view that have the 2-hour value for the Fire Rating parameter. You can then select the filter, define the visibility and graphic display settings (such as line style and color), and apply the filter to the view. When you do this, all walls that meet the criteria defined in the filter update with the appropriate visibility and graphics settings.