Learn how to use the Symmetry command to constrain two or more objects so that they are symmetrical in a sketch in Fusion.
Click Sketch > Constraints > Symmetry .
The Symmetry constraint icon displays next to the cursor in the canvas.
In the canvas, select the sketch geometry you want to constrain.
Select the line of symmetry.
The sketch geometry snaps to mirror across the line of symmetry. A constraint badge displays next to the constrained geometry in the canvas, indicating that the geometry is constrained to remain identical to each other in relation to a common axis.