Catia+v5+sketch+tools Now

Always run Sketch Analysis to ensure your profile is "Closed" before moving to the Part Design workbench.

The geometry has free degrees of freedom and can still be accidentally dragged or distorted. Add constraints. Fully constrained catia+v5+sketch+tools

Aligning elements relative to each other. Symmetry: Ensuring elements are symmetrical about an axis. Dimensional Constraints These define the specific sizes (lengths, radii, angles): Always run Sketch Analysis to ensure your profile

If you need help troubleshooting a (like an open profile) catia+v5+sketch+tools

A sketch without constraints is just a pretty picture. A sketch with constraints is an intelligent model.