Mirror
1. Choose Mirror from the Modify menu or press the button on the Modify toolbar.
2. To erase the original object, choose 0 from Copy of the Inspector toolbar; choose 1 to leave the original object intact.
3. Enter the coordinates of mirror axis start point in Start of the Inspector toolbar or specify its position on the screen.
4. Enter a rotation angle of the mirror axis relative to the positive X-axis in Angle of the Inspector toolbar or specify the second point of mirror axis on the screen.
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