Catia+v5+sketch+tools

You don't always have to create a sketch first; you can initiate a sketch directly from inside a 3D command like Pad or Rib by clicking the sketch icon next to the selection field.

Her mentor, Professor Kwan, watched and occasionally offered one of his rare smiles. "Remember," he said, tapping the monitor, "a good sketch is both precise and forgiving. You want a mechanism that dances, not one that freezes if the wind decides to breathe differently." catia+v5+sketch+tools

– This mode allows you to convert selected geometry into construction (reference) geometry. Construction elements do not participate in the calculations for geometric operations when transitioning to 3D space, making them ideal for辅助 construction lines and reference points. You don't always have to create a sketch