To display the Transform dialog, select the object you want to transform and select Home tab > Select & Edit panel > Transform.
- Select Reflect in the Transform dialog.
- Select Move or Copy. If you choose Copy, optionally select Keep link to object, and enter the number of Copies.
- Now you must specify the plane through which the objects are transformed. This plane can be specified by either selecting a plane (XZ, YZ or XY) and specifying the height of the plane (X, Y or Z respectively), or by picking a line and selecting one of the axis options (Line and X-axis, Line and Y-axis or Line and Z-axis).
- Click Finish.