# Extract Isocurves

[Extract Isocurves] command generates isparametric curves from the specified surfaces(faces).

## Step 1

For the prompt "Specify surfaces", selsect surfaces.

## Step 2

For the prompt "Select isocurve to extract", mouse-click a point on the surfaces to extract isoparametric curves. Pressing `Enter` key terminates the position specification.

- Pressing `D` key, the parameter kind of the isoparameteric curves will be changed.

- Pressing `P` key, the dialogue box to input the parameter value of the isoparameteric curves will be shown.