Learn how to use the Fix/UnFix command to lock the size and location of a point or object in a sketch in Fusion.
Click Sketch > Constraints > Fix/UnFix .
The Fix/UnFix constraint icon displays next to the cursor in the canvas.
In the canvas, select the sketch geometry you want to constrain.
The size and location of the sketch geometry is locked. The selected geometry turns green, indicating that the geometry is locked.