Copy
Mirrors and copies the elements in the selection set.
Position Angle
Sets the angle of the mirror axis. The origin of the angle measurement is the point you clicked for the beginning of the mirror axis. Setting the position angle to 0 extends the axis horizontally to the right of the screen, 90 extends the axis vertically to the top, 180 extends the axis horizontally to the left, and 270 extends the axis vertically to the bottom.