3D CAD - Modeling Basic Mechanical Components #1 - Tie-Wrap Clip

Step 3 3D CAD - Center the Rectangle Symmetrically

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From the Sketching Toolbar, Click the Constraints Options Flyout, Click Symmetric Constraint.
Note the hint in the Status Line:
 Select the axis of symmetry for the symmetric constraint. Press ESC to Cancel 

Click the Vertical Axis as the axis of symmetry for the Symmetric Constraint
A reference line is created that is co-located with the vertical axis.

Now note the changed hint in the Status Line:
 Select the FIRST figure or point for the symmetric constraint. Press ESC to Cancel 

Select the Left side of the Rectangle as the first figure, noting the status line:
 Select the SECOND line for the symmetric constraint. Press ESC to Cancel 

Then click the right side to complete the Symmetrical Constraint about the Vertical Axis.

Proceed with selecting the Horizontal Axis, and the upper and lower lines on the Rectangle to make it
symmetric about the two Axis.