How to > Advanced features and topics > Analyze > Measure > Measure direction > Measure the 3D direction of an edge tangent
  
Measure the 3D direction of an edge tangent
To measure the 3D direction of an edge tangent
1. Click Analysis and then, in the Measure group, click the arrow next to Direction.
2. Click Direction 3D. The Measure Output dialog box opens with X, Y, and Z fields.
3. Right-click the viewport and select Edge Tangent.
4. Click a point on the edge. The viewer highlights the edge.
5. You now have two choices:
If the direction of the edge is correct, click Apply.
If you want the opposite direction, click Apply Reverse.
The viewer displays the direction in the X, Y, and Z boxes.
6. You can click further measure options, or click to complete the operation.