Add Detail tool introduction
TINs do not have to consist of triangles of the same size. Use the Add Detail tool to split triangles into additional, smaller triangles, and make small detailed modifications to your TIN. Any click on your TIN creates new triangles centered around a new vertex that you can manipulate. Activate the Add Detail tool from the Tools menu.
Smaller triangles equate to a smoother final TIN. However, having an abundance of small triangles in your TIN can also decrease performance. The Add Detail tool can help strike a balance between detail and performance by allowing you to add detail only to areas of the TIN where it is needed.