As discussed in Sitework Overview, when the site model is generated, two different display modes of the site model object are available—existing and proposed. The existing site represents the site prior to your project; the proposed site incorporates the project’s changes. To modify the site model, use the Site Modifiers tool, along with other site modification tools in the Vectorworks program; a site modifier can be applied to either the existing or proposed site model.
Site modifiers can be placed on any layer. The site model properties specify whether modifiers in another layer can affect the site model (see Creating the Site Model). You might put various site modifiers on separate layers, for example, so that you can show each modifier’s effect on the site model individually. When a site modifier is placed in the drawing, the Site-DTM-Modifier class is created automatically.
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