Basically simple, sometimes i'm moving my tracks around manually to fix DRC errors, but my angles aren't perfect. I zoom in and try to fix the angles on my tracks the best I can by removing the pixels in the line, when I see no pixels on the trace borders i'm pretty sure they are accurate 45 or 90 degrees turns. What if you added CTRL while holding the trace marker (green dot on the turning points) to force them into the setting Route Angle. Keep the ALT snap as well to pin point the marker. I don't know if that would work without destroying all the layout though!