Dimensioning to a Virtual Sharp

1. Click Dimension in the Annotation group on the Detailing tab .
2. Hold Ctrl and select a line.
3. Hold Ctrl and select a converging line.The head of the note leader is attached to the virtual sharp. You can also drag the virtual sharp's end point, draw another leader to the virtual sharp, create virtual sharps in cross-section, for rounds, and between an angled and straight edge.
4. (Optional) To end the dimension at another virtual sharp,
   1. Hold Ctrl and select a line.
   2. Hold Ctrl and select a converging line.
5. Click anywhere in the annotation plane to place the dimension.