1. Usually, the outer surface of a digital model of an automobile is tangent or continuous in curvature. You can use the Select command of the Generative Surface (GSD) module.

2. Select Tangent as the expansion type, and click any face of the model to automatically select any face that you want to cut continuously!

3. If you want the whole face without parameters, just command the lightning symbol ""before starting.

Step 4: ok