Sketching allows you to explore concepts in the model.
Sketch items to see how your design ideas fit into the area you are modeling. Add features to your model such as roads, rail lines, buildings, bodies of water, landscaped regions, coverage areas, and city furniture.
You can also return to the state of your original data by regenerating. This refreshes the model with up-to-date data from the original data sources. Regenerating overrides any changes you made. For more information, see .