Add a Symmetry Constraint

General

• The symmetry constraint requires three elements (lines or points), of which the symmetry axis must be a line (segment).
• The symmetry axis is selected as the last element.
• You can select a line of the center cross of the sketch as one element.
• In sketch geometry, the symbol for symmetry constraint is .
  • You can use the F9 key to show and hide the symbols of the constraints.

Add a symmetry constraint in a plane sketch

1. Select Sketch | Constraints | Add symmetry constraint.
2. Select the first line or point.
3. Select the second line or point.
4. Select the symmetry axis.
   • The second selected line or point moves so that it is symmetric with the first line or point with respect to the symmetry axis.
   • The symmetry axis can also move if the first and second elements are locked in place with constraints.
5. Repeat steps 2 to 4 to add new symmetry constraints
6. Stop adding symmetry constraints
   • Select another function or
   • press the V key or
   • press the Esc key or
   • click the middle mouse button.