Adding Reference Planes

Click Model tabWork Plane panel (Reference Plane).
To draw a line:
1. On the Draw panel, click (Line).
2. In the drawing area, draw the reference planes by dragging the cursor.
3. Click Modify to end the line.
To pick an existing line:
1. On the Draw panel, click (Pick Lines).
2. On the Options bar, specify an offset, if desired.
3. Select the Lock option to lock the reference plane to the line.
4. Move the cursor near the line to which you want to place the reference plane and click.