Isoparametric curve
Learn how to use the Isoparametric Curve tool to extract UV curves from a surface and include them as sketch geometry in Fusion.
Design > Sketch > Create > Project/Include > Isoparametric Curve 
- In the Design workspace, on the Sketch contextual tab, select Create > Project/Include > Isoparametric Curve.
- Select a face to extract curves from.
- Select a point on the face to define the curve location.
- Choose the curve direction: U, V, or Both.
- Choose the curve type: Single or Distributed.
- Adjust distance or quantity settings as needed.
- (Optional) Clear Projection Link to create independent curves that don't update with surface changes.
- Click OK or press Enter.